Chapter 26 — Part III: The Decalogue — The Third Commandment
Section 11. The Jewish Sabbath Changed To Sunday By The Apostles — The Apostles therefore resolved to consecrate the first day of the week to the divine worship, and called it the Lord's day. St. John in the Apocalypse makes mention of the Lord's day; and the Apostle commands collections to be made on the first day of the week, that is, according to the interpretation of St. Chrysostom, on the Lord's day. From all this we learn that even then the Lord's day was kept holy in the Church.