"We … continually remind each other of these things. The wealthy among us help the needy, and we always keep together. For all things with which we are supplied, we bless the Maker of all through his Son Jesus Christ and through the Holy Spirit. On the day called Sunday, all who live in cities or in the country gather together in one place, and the memoirs of the apostles or the writings of the prophets are read, as long as time permits. Then, when the reader has ceased, the president [I think this means whichever brother is presiding, but no one knows for sure] verbally instructs and exhorts to the imitation of these good things.
Then we all rise together and pray, and … when our prayer is ended, bread and wine and water are brought, and the president in like manner offers prayers and thanksgivings according to his ability, and the people assent, saying Amen. There is a distribution to each and a participation of that over which thanks have been given, and to those who are absent a portion is sent by the deacons.
They who are well to do and willing give what each thinks fit, and what is collected is deposited with the president. He helps the orphans, widows and those who, through sickness or any other cause, are in need. [He helps] those who are in bonds and the strangers sojourning among us. In a word [he] takes care of all who are in need.
But Sunday is the day on which we all hold our common assembly, because it is the first day on which God, having made a change in darkness and matter, made the world. On the same day Jesus Christ our Savior rose from the dead. For he was crucified on the day before that of Saturn [Saturday], and on the day after that of Saturn, which is the day of the Sun, he appeared to his apostles and disciples and taught them these things." - Tertullian, c. A.D. 210