Apostolic Constitutions, Book II 38
1If, therefore, he be persuaded by the mouth of you three, it is well. But if any one hardens himself, tell it to the Church: but if he neglects to hear the Church, let him be to you as an heathen man and a publican; and receive him no longer into the Church as a Christian, but reject him as an heathen. But if he be willing to repent, receive him. For the Church does not receive an heathen or a publican to communion, before they every one repent of their former impieties; for our Lord Jesus, the Christ of God, has appointed place for the acceptance of men upon their repentance.