Apostolic Constitutions, Book VIII 23

1And I James, the son of Alphæus, make a constitution in regard to confessors: A confessor is not ordained; for he is so by choice and patience, and is worthy of great honour, as having confessed the name of God, and of His Christ, before nations and kings. But if there be occasion, he is to be ordained either a bishop, priest, or deacon. But if any one of the confessors who is not ordained snatches to himself any such dignity upon account of his confession, let the same person be deprived and rejected; for he is not in such an office, since he has denied the constitution of Christ, and is worse than an infidel.