Sabbath observance in the early church
Josephus says
"There is not any city of the Grecians, nor any of the barbarians, nor any nation whatsoever, whither our custom of resting on the seventh day hath not come!" M'Clathie, Notes and Queries on China and Japan. (edited by Dennys),Vol.4, Nos. 7,8, p.100.
In the 2nd Century
"The primitive Christians did keep the Sabbath of the Jews;..therefore the Christians for a long time together, did keep their conventions on the Sabbath, in which some portion of the Law were read: and this continued till the time of the Laodicean council." The Whole Works of Jeremey Taylor, Vol. IX, p416 (R. Heber's Edition, Vol.XII, p.416)
"The gentile Christians observed also the Sabbath." Gieseler's Church History, Vol.1, ch.2, par.30, p.93.
"The primitive Christians had a great veneration for the Sabbath, and did spend the day in devotion and sermons. And it is not to be doubted but they derived this practice from the Apostles themselves, as appears by several scriptures to that purpose." Dialogues on the Lord's Day. p.189. London: 1701. By Dr. T. H. Morer.(church of England divine)
"The Sabbath was a strong tie which united them with the life of the whole people, and by keeping the Sabbath holy they followed not only the example but the command of Jesus." Geschichte des Sonntags, pp.13,14.
"It is certain that the ancient Sabbath did remain and was observed (together with the celebration of the Lord's day by the Christians of the East Church) three hundred years after the Saviour's death." A learned Treatise of the Sabbath, p.77.
In the 3rd Century.
"The seventh-day Sabbath was.. solemnised by Christ, the Apostles, and primitive Christians, till the Laodicean Council did in a manner quite abolish the observation of it." Dissertation on the Lord's Day, pp.33,34,44.
"As early as A.D.225 their existed large bishoprics or conferences of the church of the East (Sabbath-keeping) stretching from Palestine to India."Mingana, Early Spread of Christianity. Vol.10, p.460.
"Thou shalt observe the Sabbath, on account of Him who ceased from His work of creation, but ceased not from His work of providence: it is a rest for meditation of the Law, not for idleness of the hands." The Anti-Nicene Fathers, Vol.7, p 413, From Constitutions of the Holy Apostles, A document of the 3rd and 4th centuries.
"After the festival of the unceasing sacrifice [the crucifixion] is put the second festival of the Sabbath, and is fitting for whoever is righteous among the saints to keep also the festival of the Sabbath. There remaineth therefore a Sabbatismus, that is a keeping of the Sabbath, to the people of God [Heb 4:9]" Homily on Numbers 23, par.4, in Migne, Patrologia Greaca, Vol. 12, cols.749,750.
In the 4th Century.
"It was the practice generally of the Easterne Churches; and some churches of the west..For in the church of Millaine [Milan];.. it seemes the Saturday was held in farre esteeme ..Not that the Easterne churches, or any of the rest which observed that day, were inclined to Iudaisme [Judaism]; but that they came together on the Sabbath day, to worship Iesus [Jesus] Christ the Lord of the Sabbath." History of the Sabbath (original Spelling
retained) Part 2, par. 5, pp. 73,74, London: 1636, Dr. Heylyn.
"The ancient Christians were very careful in the observation of Saturday, or the seventh day..It is plain that all the Oriental churches, and the greatest part of the world, observed the Sabbath as a festival..Athanasius likewise tells us that they held religious assemblies on the Sabbath, not because they were infected with Judaism, but to worship Jesus, the Lord of the Sabbath, Epiphanius says the same." Antiquities of the Christian Church,
Vol. II, Book XX, chap. 3, Sec. 1, 66.1137, 1138
"From the apostles' time until the council of Laodicea, which was about the year 364, the holy observation of the Jew's Sabbath continued, as may be proved out of many authors: yea, notwithstanding the decree of the council against it. Sunday a Sabbath, John Ley, p.163 London 1640.
"Ambrose, the celebrated bishop of Milan, said that when he was in Milan he observed Saturday, but when in Rome observed Sunday. This gave rise to the proverb 'When you are in Rome, do as Rome does,' " Heylyn, The History of the Sabbath, 1613
In the 5th Century.
"Down even to the fifth century the observance of the Jewish Sabbath was continued in the Christian church." Ancient Christianity Exemplified, Lyman Coleman, Ch.26, sec. 2, p.527.
"In Jerome's day (420 A.D.) the devoutest Christians did ordinary work on Sunday." Treatise of the Sabbath Day. by Dr. White, Lord Bishop of Ely, p.210.
"For although almost all Churches throught the world celebrate the sacred mysteries [the Lord's Supper] on the Sabbath of every week, yet the Christians of Alexandria and at Rome, on account of some ancient tradition, refuse to do this." The footnote which accompanies the foregoing quotation explains the use of the word "Sabbath" It says : "That is, upon the Saturday. It should be observed, that Sunday is never called 'the Sabbath' by the ancient Fathers and historians." Sacrates, Ecclesiastical History, Book 5, chap. 22, p. 289.