Nicæa I: canon II

Since, either through necessity or through the importunate demands of certain individuals, there have been many breaches of the church's canon, with the result that men who have recently come from a pagan life to the faith after a short catechumenate have been admitted at once to the spiritual washing, and at the same time as their baptism have been promoted to the episcopate or the presbyterate, it is agreed that it would be well for nothing of the kind to occur in the future. For a catechumen needs time and further probation after baptism, for the apostle's words are clear: "Not a recent convert, or he may be puffed up and fall into the condemnation and the snare of the devil". But if with the passage of time some sin of sensuality is discovered with regard to the person and he is convicted by two or three witnesses, such a one will be suspended from the clergy. If anyone contravenes these regulations, he will be liable to forfeit his clerical status for acting in defiance of this great synod.