APPENDIX – From Sabbath to Sunday: The Great Replacement

A Timeline of Sabbath Observance and Departures

Below is a chronologically ordered list of 20 quotations or references—from Scripture, early Jewish and Christian writings, church councils, and catechetical sources—relevant to Sabbath/Sunday controversies, inclusion or exclusion of Gentiles, and key doctrinal shifts. Each entry includes approximate dates (where applicable), the source, a short quotation, and a brief commentary.

“Remember the Sabbath day, to keep it holy. … For in six days Yehovah made the heavens and the earth… but he rested on the seventh day. Therefore, Yehovah blessed the Sabbath day and made it holy.”
(Circa 1450–1400 BCE) Exodus 20:8–11 (ISV)

Comment: This foundational command, given to Israel but rooted in creation, makes it clear that the seventh day is to be set apart. Ignoring or opposing this is sinful, as it disobeys a direct command from God.

“Blessed is the person… who keeps the Sabbath so as not to profane it… the foreigners who join themselves to Yehovah… all who keep the Sabbath without profaning it… these I’ll bring to my holy mountain…”
(Circa 700 BCE) Isaiah 56:2–7 (ISV)

Comment: Demonstrates Gentile inclusion in the Sabbath. Any teaching that excludes willing Gentiles from Sabbath observance contradicts this passage and is thus sinful in that it opposes the revealed will of God in Isaiah’s prophecy.

“I also gave them my Sabbaths to serve as a sign between me and them… they are to keep my Sabbaths holy…”
(Circa 592–570 BCE) Ezekiel 20:12, 20 (ISV)

Comment: Reinforces that the Sabbath is an eternal sign. Any claim that dismisses or nullifies this sign explicitly contradicts God’s stated covenant marker, thereby constituting sin.

“For as the new heavens and the new earth that I am about to make will endure before me,” says Yehovah, “so will your descendants and your name endure. And from New Moon to New Moon, and from Sabbath to Sabbath, all humanity will come to worship before me,” says Yehovah. “Then they will go out and look upon the dead bodies of the people who rebelled against me.” Isaiah 66:22-23 (ISV)

Comment: This is the final word on the matter: in the age to come, all nations will honor the Sabbath — not Sunday. What man replaced in rebellion, Yehovah will restore in glory.

“There is not any city of the Grecians… nor any nation whatsoever, whither our custom of resting on the seventh day has not come…”
(1st Century CE) Josephus, Against Apion 2.282 (sometimes 2.39 or 2.40)

Comment: Josephus confirms widespread awareness of the seventh-day Sabbath. Thoughout the diaspora.

“After the whole world had been completed according to the perfect nature of the number six, the Father hallowed the day following, the seventh, praising it and calling it holy.” (1st century CE) Philo of Alexandria, On the Creation 89, trans. C. D. Yonge.

Comment: Philo explicitly identifies the holy day as the seventh day following the six days of creation, not the first day of the following week. Writing as an Alexandrian Jew in the first century, he roots the Sabbath in the creation account itself rather than in a later national or ceremonial institution. His testimony does not establish that every culture observed the Sabbath, but it demonstrates that Jewish communities outside Judea continued to understand the seventh day as holy by creation and as an enduring part of their communal faith.

“Ye see what is His meaning; it is not your present Sabbaths that are acceptable unto Me, but the Sabbath which I have made, in the which, when I have set all things at rest, I will make the beginning of the eighth day, which is the beginning of another world. Wherefore also we keep the eighth day with joyfulness, in the which also Jesus rose from the dead, and having been manifested ascended into the heavens.” Epistle of Barnabas 15:8–9 (J. B. Lightfoot translation)

Comment: Barnabas does not appeal to an apostolic decree transferring the Sabbath to Sunday. Instead, he devotes the entire chapter to reinterpreting the Sabbath itself through an allegorical and eschatological reading of Scripture before introducing the “eighth day.” Barnabas is among the earliest extant Christian writings to reinterpret the weekly Sabbath through an allegorical and eschatological hermeneutic, rather than treating it according to its literal Mosaic institution. This represents one of the earliest surviving examples of a hermeneutical trajectory that would later contribute to the broader Christian movement away from literal Sabbath observance toward Sunday as the primary day of Christian worship.

“…no longer observing the Sabbath, but living in the observance of the Lord’s [Day]…” (Early 2nd Century CE) Ignatius of Antioch, Epistle to the Magnesians 9:1.

Comment: Ignatius is among the earliest surviving Christian writers to distinguish Christian identity from Jewish Sabbath observance. Unlike the New Testament, he does not appeal to an explicit command of Yeshua or an apostolic decree transferring the Sabbath to Sunday. Instead, he advances a post-apostolic theological rationale encouraging believers to move away from seventh-day Sabbath observance. His writings emerge during a period of intense political and social pressure following the destruction of Jerusalem (70 CE), the expansion of the Fiscus Judaicus under Domitian (81–96 CE), and the increasing suspicion directed toward all who identified with Jewish customs. In this environment, visible covenant markers—particularly Sabbath observance—became increasingly costly. Ignatius therefore stands as one of the earliest surviving witnesses to Christianity defining itself over against Jewish practice, a trajectory that would eventually contribute to the widespread abandonment of the seventh-day Sabbath throughout much of Christianity.

“Resh Lakish also said: A heathen who keeps a day of rest deserves death, for it is written, ‘And day and night shall not cease’ (Genesis 8:22).”
(Amoraic 3-5th century, redacted 5-6th century) Babylonian Talmud, Sanhedrin 58b.

Comment: This ruling illustrates how the developing rabbinic tradition increasingly restricted visible covenant markers to ethnic Israel, discouraging Gentile Sabbath observance by appealing to Genesis 8:22. This stands in direct contrast to Isaiah’s vision of foreigners who join themselves to Yehovah and keep His Sabbath (Isaiah 56:2–8), and to the apostolic Nazarene pattern in which Torah-observant Jews—both Hellenized and Hebrew-speaking—gathered in the synagogues alongside God-fearing Gentiles, proselytes, and Gentile believers who likewise assembled on the Sabbath to hear the Scriptures and worship the God of Israel (Acts 13:42–44; 15:21; 17:1–4). By the time the Babylonian Talmud reached its mature form, this trajectory had become firmly established: rabbinic Judaism increasingly excluded Gentiles from Sabbath observance, while post-apostolic Christianity increasingly discouraged it. Though approaching from opposite directions, both had departed from the earlier Nazarene pattern preserved in the New Testament.

“In so far… the observance of the Sabbath is demonstrated to have been temporary.”
(Early 3rd Century CE) Tertullian, An Answer to the Jews, Chapter 4 (ANF, Vol. III)

Comment: Tertullian represents a decisive turning point in the post-apostolic theological trajectory. Rather than merely discouraging Sabbath observance, he argues that the commandment itself was temporary—recasting nearly two millennia of covenant history as a provisional arrangement destined to pass away. Here, freedom from the Sabbath becomes a defining mark of Christian maturity, while the enduring covenant sign of Yehovah is reinterpreted as belonging to a former age. This is among the clearest early expressions of abrogation theology in Christian history. Measured against the Scriptures—which present the Sabbath as an enduring covenant sign from creation, through Israel, to the inclusion of the nations (Isaiah 56:2–8), and ultimately into the new heavens and new earth where “from Sabbath to Sabbath” all flesh will worship before Yehovah (Isaiah 66:22–23)—Tertullian’s doctrine cannot be regarded as a faithful development of apostolic teaching. Rather, it stands as a mature witness to the theological departure that came to characterize much of later Christianity.

For centuries Tertullian has been celebrated as one of the architects of Christian orthodoxy. Yet measured by the Scriptures rather than later tradition, he is more accurately understood as one of the clearest witnesses to Christianity’s departure from the apostolic and Nazarene faith.

“On the venerable day of the Sun let the magistrates and people residing in cities rest, and let all workshops be closed…”
Codex Justinianus 3.12.3 (preserving Constantine’s civil edict of 321 CE)

Comment: The 321 CE Sunday law issued by Constantine did not sanctify Sunday by biblical authority, but through imperial decree. Although Constantine publicly identified with Christianity, he continued to govern using the religious language and political traditions of the Roman Empire. By legislating “the venerable day of the Sun,” he employed terminology that remained acceptable to both Christians and adherents of Rome’s traditional solar religion, reflecting the transitional character of his reign. For the Torah-observant Nazarene believers who had continued the apostolic pattern of Sabbath observance, this represented yet another step toward their marginalization. What had begun generations earlier as a theological departure from the Jewish roots of the faith was now reinforced by imperial authority. The Sabbath was not set aside by the Scriptures, but progressively displaced by theology, tradition, and finally the decree of Caesar.

For the remaining Nazarene communities—Jewish and Gentile believers who continued in the apostolic pattern of Torah observance—such legislation confirmed that the centre of institutional Christianity had moved decisively away from the faith once delivered to the saints.

“Christians shall not Judaize and be idle on Saturday, but shall work on that day; rather honoring the Lord’s Day… if any shall be found to be Judaizers, let them be anathema.”
(363–364 CE) Council of Laodicea, Canon 29.

Comment: Canon 29 marks the culmination of a theological trajectory that had developed over nearly three centuries. What Barnabas had introduced through allegorical reinterpretation, Ignatius through ecclesiastical identity, Tertullian through abrogation theology, and Constantine through imperial legislation, Laodicea now codified into church law. Christians were no longer merely encouraged to honour Sunday—they were forbidden to “Judaize” by resting on the biblical Sabbath, and those who persisted were placed under anathema. In doing so, the council did not merely reinterpret the Fourth Commandment; it formally condemned the continuing Nazarene practice of Torah-observant believers and elevated ecclesiastical authority above the plain commandment of God. The biblical Sabbath had not been abolished by Scripture, but by the institutional church claiming authority to legislate where the Scriptures had not.

For the first time in church history, obedience to the seventh-day Sabbath could itself become grounds for ecclesiastical condemnation. The Nazarene faith had not disappeared because the Scriptures had changed. It had been progressively displaced until the practice of the apostles could itself be condemned as heresy.

“It is not lawful to receive portions sent from the feasts of Jews or heretics, nor to feast together with them.”
(363–364 CE) Council of Laodicea, Canon 37 (numbering varies)

Comment: Canon 37 was not merely a rule about food—it was a declaration of identity. The appointed times of Yehovah were inseparably bound to the Sabbath calendar, marked by weekly Sabbaths, annual Sabbaths, and sacred assemblies in which Torah-observant Jews, proselytes, God-fearers, and Gentile believers worshipped and rejoiced together as one body in Israel’s Messiah (Acts 2:46; 1 Corinthians 5:7–8). To forbid Christians from sharing the table at these feasts was to dismantle one of the clearest expressions of the apostolic community itself.

At the very same time, emerging Rabbinic Judaism was increasingly restricting Gentile participation in Israel’s covenant life. Thus, from opposite directions, both institutions came to define holiness by separation: one withdrawing Israel from the nations, the other withdrawing the nations from Israel. Like the Gezerot of the House of Shammai, the Church now erected its own boundaries, making separation itself a mark of faithfulness rather than reconciliation in Messiah.

The Nazarenes became homeless. No longer fully accepted by the synagogue because they confessed Yeshua, and now increasingly rejected by the Church because they continued in the apostolic pattern of Torah, Sabbath, and the feasts, they found themselves without an institutional home. What Yehovah had begun to unite in His Messiah was gradually divided by both Rabbinic Judaism and institutional Christianity, each departing in opposite directions from the integrated Nazarene faith preserved in the New Testament.

For a broader examination of these parallel departures, see How Christianity and Judaism Both Betrayed the Covenant and Two Sides, Same Mistake.

“But keep the Sabbath… also keep the Lord’s Day festival… on the Sabbath we commemorate the creation, on the Lord’s Day we commemorate the resurrection.”
(Late 4th Century CE) Apostolic Constitutions, Book II, Section 36 (paraphrased)

Comment: The Apostolic Constitutions reveal the Church attempting to reconcile two competing realities: the enduring practice of Sabbath observance across much of the Christian world and the growing desire to distinguish Christianity from its Jewish roots. Rather than reaffirming the Fourth Commandment as Yehovah gave it, the document quietly redefines its purpose. The Sabbath is no longer presented as the covenant sign of holy rest commanded by Yehovah, but primarily as a weekly remembrance of creation, while the Lord’s Day becomes the Church’s principal celebration. Creation is retained; covenant obligation is eclipsed. The commandment survives, but under a new authority and for a new reason.

Yet this very compromise exposes a Church that had not reached consensus. Only a few years after Laodicea anathematized “Judaizing,” the Apostolic Constitutions still found it necessary to instruct believers to keep the Sabbath. The transition was plainly incomplete. After Constantine’s Sunday legislation, Christian practice was no longer shaped simply by the Scriptures or the apostolic pattern, but increasingly by imperial favour, regional custom, and competing ecclesiastical authorities. The question was shifting from “What has Yehovah commanded?” to “How should the Church regulate what remains?”

Like Jeroboam, who continued to worship Yehovah while altering His appointed times according to human wisdom (1 Kings 12:32–33), the Church preserved the language of obedience while transferring the authority to define it from Yehovah’s commandments to ecclesiastical tradition.

“Almost all churches throughout the world celebrate the sacred mysteries on the Sabbath of every week, yet the Christians of Alexandria and Rome, on account of some ancient tradition, have ceased to do this.”
(5th Century CE) Socrates Scholasticus, Ecclesiastical History 5.22 (paraphrased)

Comment: Socrates Scholasticus records one of the most remarkable admissions in early Church history. Writing in the fifth century, he states that almost all churches throughout the world continued to celebrate the sacred mysteries on the weekly Sabbath, while Rome and Alexandria stood apart because of an “ancient tradition.” Significantly, he appeals neither to Scripture nor to the practice of Yeshua and His apostles, but simply to tradition. By his day, what had begun as successive departures had become old enough to be regarded as ancient.

His testimony confirms that Sabbath observance remained widespread long after theological controversy, imperial legislation, and ecclesiastical decrees had sought to replace it. The departure had not become universal—it had become influential.

There is a profound irony here. What Barnabas reinterpreted, Ignatius encouraged, Tertullian defended, Constantine enforced, and Laodicea legislated had, by Socrates’ lifetime, become simply “an ancient tradition.” Innovation had matured into orthodoxy.

This should give every Protestant pause. Most have inherited Sunday worship believing it to be the universal apostolic practice, recovered by the Reformers from later Roman corruption. Yet Socrates describes something entirely different: Rome and Alexandria—not the worldwide Church—as the churches that had departed from the weekly Sabbath. If the Reformation called Christians back to Scripture, why was this inherited tradition never subjected to the same test?

Socrates unintentionally preserves a forgotten reality: the apostolic pattern had not disappeared—it had been eclipsed. What later generations inherited as settled Christian tradition was, in his own account, the regional custom of a few influential churches that gradually reshaped the Christian world.

“Assemblies are not held in Rome, nor at Alexandria, on the Sabbath… in nearly all the other churches they are held.”
(5th Century CE) Sozomen, Ecclesiastical History 7.19 (paraphrased)

Comment: Sozomen confirms the extraordinary reality already preserved by Socrates Scholasticus: Rome and Alexandria had ceased assembling on the Sabbath, while “nearly all the other churches” continued to do so. This was no minor regional disagreement. After centuries of heresiologists condemning the Nazarenes, after imperial Sunday legislation, and after Laodicea had anathematized Sabbath rest, the centres claiming authority to define orthodoxy still had not brought most of the Christian world into conformity with their practice.

Yet this testimony also stands near the end of an era. Jewish believers in Yeshua had not vanished, nor had the Gentile disciples who continued alongside them in the older apostolic pattern. They were still there—worshipping the God of Israel, confessing His Messiah, and assembling on His Sabbath—while the institutions that had condemned them were acquiring the power to determine which practices, communities, and even scriptural traditions would survive.

Within this same fifth-century world, the widely used Syriac Diatessaron was forcibly removed from churches and replaced with the four separate Gospels, while the older Syriac textual tradition was revised toward the increasingly standardized Greek form. The authority that Rome and Alexandria represented had not prevailed because nearly all Christians had always followed it. It prevailed because ecclesiastical and imperial power could eventually make a regional departure normative throughout the Christian world.

History remembers the bishops, councils, and emperors who defined the victorious tradition. It has largely forgotten the Jewish and Gentile disciples whose living continuity with the earliest assemblies was steadily condemned, displaced, and finally obscured. Socrates and Sozomen allow us to see them once more, immediately before that independent stream largely disappears from the surviving historical record.

“In our own day there exists among the Jews throughout all the synagogues of the East a sect… commonly called Nazarenes. They believe in Christ… who suffered under Pontius Pilate and rose again… But while they desire to be both Jews and Christians, they are neither the one nor the other.” (c. 404 CE) Jerome, Letter 75 (to Augustine)

Comment: Jerome’s testimony is among the final explicit references to the Nazarenes in the historical record. Writing in the early fifth century, he acknowledges that they still existed “throughout all the synagogues of the East,” confessing Yeshua as the Messiah while continuing to identify with the Jewish people and their ancestral way of life. Read alongside the testimony of Socrates and Sozomen, this is deeply significant. The same eastern world in which “nearly all the other churches” were still assembling on the Sabbath was also home to living Nazarene communities preserving the faith first proclaimed from Jerusalem.

Jerome does not describe these believers as the heirs of the apostles, but as a sect to be rejected. That reversal reveals how profoundly the centre of authority had shifted. The communities most closely identified with the original, Torah-observant apostolic stream—including the Sabbath-keeping pattern traced throughout this appendix—had become viewed not as the standard of Christian faith, but as relics of an earlier age.

After Jerome, that distinct Nazarene witness largely disappears from the surviving historical record. Whether through gradual assimilation, persecution, isolation, or simple neglect, the independent voice descending from the Jerusalem assembly is heard no more. From this point onward, Christian history is told almost entirely by those who had already rejected the Nazarene understanding of the faith. The tragedy is not merely that the Nazarenes faded from view, but that the living communities which had carried the apostolic tradition for centuries largely disappeared from history just as institutional Christianity became the principal guardian of its memory.

“Tatian also composed the Gospel which is called the Diatessaron, cutting out the genealogies and such other passages as show the Lord to have been born of the seed of David according to the flesh. This work was used not only by those of his own sect, but also by those who followed the apostolic doctrine, as they did not perceive the mischief of the composition, but in their simplicity made use of the book because of its brevity. I myself found more than two hundred such copies held in respect in the churches in our parts. All these I collected and put away, and I replaced them with the Gospels of the four Evangelists.”
Theodoret of Cyrrhus, Compendium of Heretical Fables (Haereticarum Fabularum Compendium), Book I, Chapter 20 (c. AD 453).

Comment: Theodoret’s testimony reveals that ecclesiastical standardization extended beyond doctrine and worship into the very texts read by the churches. He found more than two hundred copies of Tatian’s Diatessaron held in honour throughout his district and removed them, replacing them with the four separate Gospels. Most significantly, he admits that the work was being used not only by Tatian’s followers, but by “those who followed the apostolic doctrine.” These were not simply obscure heretical communities resisting correction. They were churches Theodoret himself regarded as apostolic in doctrine, yet whose inherited scriptural tradition no longer conformed to the standard he intended to establish.

The timing is remarkable. Socrates and Sozomen had just acknowledged that, outside Rome and Alexandria, Sabbath assemblies remained widespread, while Jerome confirmed that Nazarene believers still endured throughout the East. Theodoret now shows that churches in this same eastern world also retained a deeply rooted textual tradition distinct from the emerging ecclesiastical norm. The evidence does not prove that every church using the Diatessaron was Nazarene or observed the Sabbath, but it does reveal that the older eastern Christian world had not yet been fully standardized in its worship, identity, or Scriptures.

Theodoret’s actions therefore mark more than the replacement of one Gospel format with another. They show institutional authority reaching into churches still described as following “the apostolic doctrine” and removing a tradition those churches had received and honoured for generations. This is precisely how the older apostolic stream disappears from view: not necessarily through a single universal renunciation of the Sabbath or an immediate extinction of its communities, but through the gradual loss of their power to preserve their own inherited forms independently.

By the time later generations received Christian history, the churches of Rome and Alexandria no longer appeared as influential exceptions to a wider Sabbath-assembling world. Their theological, liturgical, and textual standards had become the framework through which that earlier world was remembered. Theodoret allows us to witness that transition taking place—not after the apostolic inheritance had already vanished, but while churches he himself called apostolic were still carrying traditions that institutional orthodoxy was actively replacing.

“It has come to my ears that certain men of perverse spirit have sown among you some things that are wrong and opposed to the holy faith, so as to forbid any work being done on the Sabbath day. What else can I call these but preachers of Antichrist, who, when he comes, will cause the Sabbath day as well as the Lord’s day to be kept free from all work?”
Registrum Epistolarum (Register of Letters), Book XIII, Epistle 1 (To the Roman Citizens).

Comment: Gregory’s letter demonstrates that the Sabbath question had not disappeared with the passing of the Nazarenes from the historical record. More than a century after Theodoret, teachers within the Roman sphere were still advocating cessation from labour on the seventh-day Sabbath strongly enough that the bishop of Rome publicly condemned them. His extraordinary description of such teachers as “preachers of Antichrist” is itself evidence that the issue remained alive. Had Sabbath observance already vanished from Christian memory, such a denunciation would have been unnecessary. The controversy endured because the older apostolic understanding had not yet been completely extinguished.

“We will not practise carnal circumcision, or celebrate the Passover, the Sabbath or the other feast days connected with the Jewish religion.”
Profession of Faith Required of Jews (Visigothic Spain, seventh century) Preserved in the Monumenta Germaniae Historica and translated in the Medieval Sourcebook.

Comment: This profession reveals how completely the boundaries of institutional Christianity had been redrawn. Jewish people entering the Catholic Church were not merely required to confess the Christian faith; they were compelled to renounce circumcision, Passover, the Sabbath, and the other biblical festivals, and to bind their children and descendants to the same abandonment.

The Sabbath therefore appears here precisely as a covenant marker. Its rejection served as visible proof that a Jewish convert had severed continuity with the religious life of Israel. What had been observed by Yeshua, the apostles, and the original Jerusalem assembly was now classified as belonging to a foreign religion from which Christians were expected to separate themselves.

This is almost the reversal of the apostolic pattern recorded in Acts. The earliest Jewish believers did not cease to be Jews when they confessed Yeshua, nor were they required to abandon the Sabbath and the appointed times. By the seventh century, however, Jewish people could be admitted into Catholic society only by formally repudiating the practices that connected them to Israel and to the Scriptures.

The document does not prove the survival of a distinct Nazarene community in Visigothic Spain. It proves something equally important for this history: the disappearance of Jewish apostolic memory was not entirely natural or voluntary. It was enforced through public professions that made rejection of the Sabbath part of the definition of Christian identity.

“Since we understand that in the city of the Romans, in the holy fast of Lent they fast on the Saturdays, contrary to the ecclesiastical observance which is traditional, it seemed good to the holy synod that also in the Church of the Romans the canon shall immovably stand fast which says: ‘If any cleric shall be found to fast on a Sunday or Saturday—except on one occasion only—he is to be deposed; and if he is a layman he shall be cut off.’”
Council in Trullo (Quinisext Council), Canon 55, AD 692 In Nicene and Post-Nicene Fathers, Second Series, Vol. 14, The Canons of the Quinisext Council.

Comment: Nearly three centuries after Socrates and Sozomen described Rome as an exception to the widespread Christian observance of Saturday, the same geographical division remained visible. The Council in Trullo condemned the Roman practice of fasting on the Saturdays of Lent and appealed to what it regarded as traditional ecclesiastical observance, according to which fasting on Saturday—apart from one exceptional Sabbath—was forbidden.

This does not establish that the Byzantine churches observed the Sabbath in the full biblical sense of resting from ordinary labour. It does demonstrate that the seventh day had not become an ordinary weekday throughout Christianity. In the East, Saturday retained a distinctive sacred and celebratory character and continued to be placed beside Sunday as a day inappropriate for fasting.

Canon 55 therefore preserves a residual memory of the Sabbath within eastern Christianity. The covenantal observance had been reduced and reinterpreted, but the inherited distinction of the seventh day remained strong enough for an ecumenical council in Constantinople to rebuke Rome for treating it differently.

The significance is not that Trullo restored the Sabbath. It is that Rome’s practice still had not become universal. Centuries after the identifiable Nazarene communities began fading from the record, the Christian East continued to preserve traces of the older pattern in which both Sabbath and the first day held places of honour.

MUSLIM SOURCE

ʿAbd al-Jabbār, Tathbīt dalāʾil nubuwwat sayyidinā Muḥammad, composed around AD 995.

Translated in Gabriel Said Reynolds, A Muslim Theologian in the Sectarian Milieu: ʿAbd al-Jabbār and the Critique of Christian Origins (Leiden: Brill, 2004).

“[Christ] never took Sunday as a feast, nor did he ever build a church. He did not abolish the Sabbath, even for one hour. He never ate pork, but forbade it and cursed those who ate it, just as the prophets did before him.” Gabriel Said Reynolds, A Muslim Theologian in the Sectarian Milieu: ʿAbd al-Jabbār and the Critique of Christian Origins (Leiden: Brill, 2004).

Comment: Writing near the end of the tenth century, the Muslim theologian ʿAbd al-Jabbār directly contrasts the life of Yeshua with the religion subsequently practised in his name. He argues that Yeshua did not establish Sunday as a festival, did not abolish the Sabbath, and did not abandon the Torah’s dietary distinctions. Whatever judgment is made concerning his wider polemic against Christianity, the historical contradiction he identifies is unmistakable: the practices of institutional Christianity could not simply be read backwards into the life of the Jewish Messiah.

This testimony is especially valuable because it comes from outside the Christian ecclesiastical tradition. ʿAbd al-Jabbār had no interest in defending Christian Sabbath observance for its own sake. Yet he recognized that the Sabbath belonged to the documented life and teaching of Yeshua, whereas Sunday observance belonged to the later Christian community.

The passage also joins several practices that repeatedly appear together in descriptions of the Nazarenes: Sabbath observance, fidelity to the Torah, and abstention from pork. In ʿAbd al-Jabbār’s argument, these are not unrelated Jewish customs but visible evidence of the continuity between Yeshua and the prophets who preceded him.

This does not prove that ʿAbd al-Jabbār personally encountered a surviving Nazarene congregation. It does prove that, nearly one thousand years after Yeshua, an Arabic writer could still articulate a memory of Messiah that stood in direct opposition to the customs of imperial Christianity: Yeshua remained within the Torah, did not abolish the Sabbath, and did not appoint Sunday in its place.

“I have come to you only to act in accordance with the Torah and the commandments of the prophets before me. I did not come to nullify but to complete.”
“For with God it is easier for the sky to fall upon the earth than to nullify anything from the law of Moses.” Gabriel Said Reynolds, A Muslim Theologian in the Sectarian Milieu: ʿAbd al-Jabbār and the Critique of Christian Origins (Leiden: Brill, 2004).

Comment: ʿAbd al-Jabbār understood Yeshua’s declaration in Matthew 5 as an affirmation of the continuing authority of the Torah, not as a cryptic announcement that its commandments were about to disappear. Although his wording expands the canonical passage, the interpretation itself follows its plain logic: Yeshua did not come to annul the Torah or the prophets, and the smallest commandment was not to be treated as expendable.

This matters for the history of the Nazarenes because the interpretation later dismissed as “Judaizing” is precisely the interpretation that naturally arises from Yeshua’s own recorded words. The medieval Muslim polemicist therefore preserves an external witness to the central Nazarene claim: faithfulness to Messiah and faithfulness to the Torah were not originally opposing loyalties.

The historical rupture occurred not because Yeshua announced the abolition of the law of Moses, but because later Christian interpreters increasingly read that abolition into his mission. ʿAbd al-Jabbār’s criticism exposes the distance between the Torah-affirming Messiah of the Gospel accounts and the law-free Christianity that eventually claimed to represent him.

So he allowed them to do a benevolent action on the Sabbath. But if he were declaring the Sabbath licit, he would have said so and brought that forth, instead of making an argument.”
“Pray to God and implore Him that your fleeing and exodus be not on the Sabbath day and not in winter.”

Comment: This is an unusually perceptive medieval reading of the Sabbath controversies in the Gospels. ʿAbd al-Jabbār recognizes that Yeshua’s defence of healing and mercy on the Sabbath would be an unnecessarily elaborate argument if his purpose had simply been to abolish the commandment. Yeshua did not answer his opponents by declaring the Sabbath invalid. He argued from within the Torah concerning what faithful Sabbath observance permitted.

The appeal to Matthew 24:20 strengthens the point. Yeshua instructed his disciples to pray that a future flight would not occur on the Sabbath. Whatever date is assigned to the anticipated crisis, the saying assumes that the Sabbath would remain meaningful to his followers after his own ministry.

The Gospel disputes therefore concern the interpretation of Sabbath, not its replacement by Sunday. ʿAbd al-Jabbār saw this distinction clearly: acts of mercy did not annul the covenant marker, and Yeshua’s correction of restrictive interpretations cannot legitimately be transformed into the abolition of the day itself.

“A group of the Christians left Jerusalem and went to Antioch and elsewhere in Syria. They called the people to the practice of the Torah, to forbid eating meat slaughtered by those who were not from their people, to circumcision, to establish the Sabbath, to forbid pork and that which the Torah forbade them.”

Comment: This passage preserves a remarkable medieval memory of Torah-observant believers emerging from Jerusalem and carrying their practices into Antioch and Syria. Their identifying characteristics are the same constellation repeatedly associated with the early Nazarene movement: attachment to Jerusalem, observance of the Torah, Sabbath keeping, circumcision, dietary distinction, and abstention from pork.

The passage cannot be treated as an independent tenth-century historical record of the events described in Acts. ʿAbd al-Jabbār has expanded the biblical narrative and incorporated it into his criticism of later Christianity. Nevertheless, the form of the expansion is historically important. His account assumes that the earliest Jerusalem believers were Torah-observant followers of Yeshua and that their movement spread outward into Syria before later Christianity abandoned their practices.

That memory is closely aligned with the geographical history of the Nazarenes. Jerusalem, Antioch and Syria were precisely the regions in which Jewish believers and Jewish-Christian Gospel traditions remained visible for centuries. Whether ʿAbd al-Jabbār drew this material entirely from biblical interpretation, from earlier anti-Christian literature, or from a surviving Jewish-Christian source remains debated. Some scholars, most notably Shlomo Pines, argued that portions of the work preserve earlier Judaeo-Christian material.

The passage should therefore be used cautiously but not neglected. It demonstrates that the medieval Arabic world retained a coherent alternative account of Christian origins: the original followers of Yeshua came from Jerusalem, upheld the Torah and established the Sabbath, while the Christianity of later centuries represented a departure from them.

In 1449, Emperor Zara Yaqob officially settled a dispute by declaring that both Saturday and Sunday were to be honoured throughout the Ethiopian Church. That wasn’t an innovation—it was recognizing a practice that had existed for centuries in Ethiopia

Comment: In medieval Ethiopia the seventh-day Sabbath was not a forgotten Jewish custom occasionally rediscovered by an isolated reader. It became the centre of a prolonged struggle involving monks, bishops, monasteries and emperors. Ewostatewos and his disciples defended the sanctity of Saturday alongside Sunday, endured ecclesiastical opposition, established an enduring network of monasteries, and eventually saw their position formally accepted under Emperor Zara Yaqob.

This is one of the clearest demonstrations that the triumph of Sunday-only Christianity was never universal. Nearly one thousand years after the councils commonly said to have settled the question, an ancient Christian kingdom was still contending over the continuing authority of the seventh day.

The Ethiopian evidence should not be reduced to the claim that Christians merely held services on Saturday. The Ewostatean controversy concerned the sanctity and observance of the day itself. Its persistence reveals that Sabbath memory remained strong enough to survive exile, institutional resistance and generations of dispute.

Direct historical descent from the ancient Nazarenes cannot presently be demonstrated. Nevertheless, Ethiopia preserves the covenant marker in a form almost entirely lost from western Christianity. At the far edge of the conventional Christian world, the Sabbath remained sufficiently alive to reorder the relationship between monastic communities, the national church and the imperial throne.

“The Church… has changed the Sabbath into Sunday… not by command of Christ, but by its own authority…”
(Mid-16th Century, Council of Trent, 1545–1563) (paraphrased from session references)

Comment: The Catechism of the Council of Trent openly acknowledges that the Church changed the Sabbath observance to Sunday, not based on any command from Christ, but by its own institutional authority. This admission is critical: it proves that Sunday observance was not inherited from the apostles, nor rooted in Scripture. It was a decision of power — a declaration that Church tradition could override the Word of God. (Just as the rabbi’s did in the story of the ovens Bava Metzia 59b)The Church didn’t preserve the faith once delivered; it edited it. While Scripture says the Sabbath is a perpetual sign (Exodus 31:16) and Yeshua affirmed the Law (Matthew 5:17–18), the Church declared otherwise. This is the fulfillment of Daniel 7:25 — a power that would ‘think to change times and laws.’

“Q: How prove you that the Church hath power to command feasts and holy days?”
“A: By the very act of changing the Sabbath into Sunday, which Protestants allow of, and therefore they fondly contradict themselves by keeping Sunday strictly, and breaking most other feasts commanded by the same Church.”
Douay Catechism (Rev. Henry Tuberville, 1649), Section: “The Third Commandment,” page 58 (Benziger Bros. edition).

Comment: This admission from the Catholic catechism is significant — not because it proves Sunday is biblical, but because it proves it isn’t. The Church plainly states that it changed the Sabbath by its own authority, not based on Scripture. Even more, it points out that many Protestants still observe this man-made change while denying the Church’s power, creating a contradiction. This invites us to take a step back and ask: if the Sabbath was never changed by Christ or the apostles, who truly has the right to alter one of God’s Ten Commandments? Returning to the seventh day — the day blessed and sanctified by God from creation — is not legalism, but humble obedience to the One who never changes and whose Word stands forever.

“Jesus rose from the dead ‘on the first day of the week’… For Christians it has become the first of all days… Sunday—fulfillment of the Sabbath…”
(1992 CE) Catechism of the Catholic Church, Paragraph 2174

Comment: Yeshua’s resurrection on the first day of the week is central to our faith — a divine act that confirms His identity and our future hope. Yet the Bible never says that this sacred event changed the Sabbath. The Catholic Church teaches that Sunday is now the “fulfillment of the Sabbath,” a position that flows not from Scripture, but from Church authority. This continues a long pattern of tradition taking precedence over God’s commands — the same tradition that proudly claimed it changed the Sabbath, not by Christ’s instruction, but by its own power. The resurrection should lead us deeper into obedience, not away from the covenant sign Yehovah established from the beginning.

“What is God’s will for you in the fourth commandment? That the gospel ministry and schools for it be maintained… and that I diligently attend the church of God on the Lord’s Day…”
Heidelberg Catechism (1563), Lord’s Day 38

“As it is the law of nature, that, in general, a due proportion of time be set apart for the worship of God; so, in His Word, by a positive, moral, and perpetual commandment… He hath particularly appointed one day in seven, for a Sabbath, to be kept holy unto Him; which, from the beginning of the world to the resurrection of Christ, was the last day of the week; and, from the resurrection of Christ, was changed into the first day of the week…”
Westminster Confession of Faith (1646), Chapter 21, Section 7

“…he hath particularly appointed one day in seven… which, from the beginning of the world to the resurrection of Christ, was the last day of the week; and from the resurrection of Christ, was changed into the first day of the week…”
Baptist Confession of Faith (1689), Chapter 22, Section 7

“We believe that the first day of the week is the Lord’s Day, or Christian Sabbath…”
The New Hampshire Baptist Confession (1833):

Comment: Now even the Protestants join in, calling Sunday the “Christian Sabbath” — not because God said so, but to remember the resurrection. Yet this language is borrowed straight from Rome, echoing the same substitution first declared by popes and councils who claimed the authority to change God’s laws. The Reformers protested papal power, but never fully broke free from it. They left behind the idols, the indulgences, the Latin masses — but kept the man-made Sabbath Rome installed. The result? A Reformation built halfway, still chained to tradition. Sunday is not the biblical Sabbath. It was never sanctified by Yehovah, never commanded by Yeshua, never taught by the apostles. To call it holy is to uphold the very change that Rome itself boasts as proof of its power. One cannot cry “sola Scriptura” and then sanctify a day God never blessed.

The Golden Calf of Christendom

What began as a subtle shift became a global rupture — a separation from the true faith, from the way of the King of Kings. By Rome’s reckless decrees, the holy Sabbath was defiled, the root of Israel vilified, and the tree into which the Gentiles were grafted burned to the ground. In its place rose the sin of Jeroboam — a golden calf dressed in Christian robes: Sunday worship, enshrined not by command of God, but by imperial law. Constantine did what Jeroboam had done — created a counterfeit center of worship to consolidate power, and millions followed. Rome didn’t just change the day — it replaced obedience with tradition and passed this corruption to the Protestants who, though they fled the papacy, kept the calf. Thus the “Christian Sabbath” stands not as a fulfillment of Scripture, but as a monument to rebellion — a legacy of Constantine and the Holy Roman Empire, not of Yeshua and the apostles. The call now is the same as it was then: Come out of her, My people (Revelation 18:4), and return to the ancient path — the covenant, the commandments, the day He sanctified — the way of the King.