Early Christians
"The primitive Christians had a great veneration for the Sabbath, and spent 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 the purpose." "Dialogues on the Lord's Day," p. 189. London: 1701, By Dr. T.H. Morer (A Church of England divine).
"...The Sabbath was a strong tie which united them with the life of the whole people, and in keeping the Sabbath holy they followed not only the example but also the command of Jesus." "Geschichte des Sonntags," pp.13, 14
"The primitive Christians did keep the Sabbath of the Jews;...therefore the Christians, for a long time together, did keep their conventions upon the Sabbath, in which some portions of the law were read: and this continued till the time of the Laodicean council." "The Whole Works" of Jeremy Taylor, Vol. IX,p. 416 (R. Heber's Edition, Vol XII, p. 416).