Chapter 26 — Part III — The Ten Commandments
Section 540. Q. Is there any mention in holy Scripture of keeping the day of the Resurrection? A. In the book of the Acts of the Apostles it is mentioned that the disciples--that is, the Christians--came together on the first day after the Sabbath, which was the first day of the week, or Day of the Resurrection, for the breaking of bread, that is to say, for the celebration of the Sacrament of the Communion. Acts xx. 7. The Apostle and Evangelist John also in the Apocalypse mentions the Lord's Day, or the Day of the Resurrection.