Romans 2:1

In the Gospel according to Luke: “Judge not, that ye be not judged: condemn not, that ye be not condemned.” Of this same subject to the Romans: “Who art thou that judgest another man’s servant? to his own master he standeth or falleth. But he shall stand; for God is able to make him stand.” And again: “Wherefore thou art without excuse, O every man that judgest: for in that in which thou judgest another, thou condemnest thyself; for thou doest the same things which thou judgest. But dost thou hope, who judgest those who do evil, and doest the same, that thou thyself shalt escape the judgment of God?” Also in the first Epistle of Paul to the Corinthians: “And let him that thinketh he standeth take heed lest he fall.” And again: “If any man thinketh that he knoweth anything, he knoweth not yet in what manner he ought to know.”

10. Our belief concerning that perverse and unjust Council is, that it was composed chiefly of traditors whom Secundus of Tigisis had pardoned on their confession of guilt; and who, when a rumour had gone abroad that some had been guilty of delivering up the sacred books, sought to turn aside suspicion from themselves by bringing a calumny upon others, and to escape the detection of their crime, through surrounding themselves with a cloud of lying rumours, when men throughout all Africa, believing their bishops, said what was false concerning innocent men, that they had been condemned at Carthage as traditors. Whence you perceive, my beloved friends, how that which some of your party affirmed to be improbable could indeed happen, viz. …

32. But it will be urged that it is written of heretics that "they are condemned of themselves." What then? are they not also condemned of themselves to whom it was said, "For wherein thou judgest another, thou condemnest thyself?" But to these the apostle says, "Thou that preachest a man should not steal, dost thou steal?" and so forth. And such truly were they who, being bishops and established in Catholic unity with Cyprian himself, used to plunder estates by treacherous frauds, preaching all the time to the people the words of the apostle, who says, "Nor shall extortioners inherit the kingdom of God."

47. But when He says, “saving for the cause of fornication,” He has not said of which of them, whether the man or the woman. For not only is it allowed to put away a wife who commits fornication; but whoever puts away that wife even by whom he is himself compelled to commit fornication, puts her away undoubtedly for the cause of fornication. As, for instance, if a wife should compel one to sacrifice to idols, the man who puts away such an one puts her away for the cause of fornication, not only on her part, but on his own also: on her part, because she commits fornication; on his own, that he may not commit fornication. Nothing, however, is more unjust than for a man to put away his wife because of fornication, if he himself also is convicted of committing fornication. …

Chap. ii. ver. 1 . “Therefore thou art inexcusable, O man; whosoever thou art that judgest; for wherein thou judgest another, thou condemnest thyself.”