Titus 3:10

Irenaeus Against Heresies Book I

But as many as separate from the Church, and give heed to such old wives' fables as these, are truly self-condemned; and these men Paul commands us, "after a first and second admonition, to avoid."[217]

Irenaeus Against Heresies Book III " Such was the horror which the apostles and their disciples had against holding even verbal communication with any corrupters of the truth; as Paul also says, "A man that is an heretic, after the first and second admonition, reject; knowing that he that is such is subverted, and sinneth, being condemned of himself."[9]

Tertullian The Prescription Against Heretics

who also intimates to Titus, that "a man who is a heretic" must be "rejected after the first admonition," on the ground that "he that is such is perverted, and committeth sin, as a self-condemned man."[49]

Origen de Principiis Book II

We have heard, indeed, that certain heretics have dared to say that there are two Gods and two Christs, but we have never known of the doctrine of two Holy Spirits being preached by any one.[105]

Origen Against Celsus Book V

And if those who hold different opinions will not be convinced, we observe the injunction laid down for the treatment of such: "A man that is a heretic, after the first and second admonition, reject, knowing that he that is such is subverted, and sinneth, being condemned of himself."[197]

Cyprian Epistle LIV

And again: "A man that is an heretic, after one admonition, reject: knowing that he that is such is subverted, and sinneth, being condemned of himself."[66]

Cyprian Treatise XII Three Books of Testimonies Against the Jews

To Titus: "A man that is an heretic, after one rebuke avoid; knowing that one of such sort is perverted, and sinneth, and is by his own self condemned."[729]

Dionysius A Commentary on the Beginning of Ecclesiastes

A time to speak, when there are hearers who receive the word; but a time to keep silence, when the hearers pervert the word; as Paul says: "A man that is an heretic, after the first and second admonition, reject."[36]