Repentance was an involved process in the early church. Sin was seen not as a personal matter but as something that destroyed the unity of the church. Penitents fasted and prayed for the forgiveness of their sins, appeared before the church to make public confession, and were barred from the Lord’s Supper until they gave evidence of a change of heart and were absolved. (The only exception was for people facing persecution. They were readmitted to the Lord’s Supper so they could receive strength.)
—John O. Gooch
You can learn more about Worship in the Early Church in the archives of Christianity Today.