Cyril of Alexandria

But the rest, those who denied and despised him, shall be denied: when the Judge shall say to them that, as it were, which was spoken by the holy prophets to certain of old; "As you have done, it shall be done unto you; and your requital shall be requited upon yours own head;" and shall deny them in these words: "Depart from Me, you workers of iniquity, I know you not." And who then are they that shall be denied? First of all, those who when persecution was pressing upon them, and tribulation had overtaken them, deserted the faith. …

Commentary on the Gospel of Luke, Sermon 88 ↗

Theophylact of Ohrid

Now He offers a reward for the confession of faith. Since He said, "do not fear those who kill the body" and added that "the very hairs of your head are all numbered," lest someone should say: then give me some reward as well, for what good does it do me that You have numbered my hairs. He says (to such a person): do you desire a reward as well? Listen. Whoever confesses (faith) in Me, that one will be acknowledged by Me before God. …

Commentary on Luke ↗

Cyprian

Nay, if they shudder at the magnitude of the guilt incurred; if with a truly medicinal hand they deal with the deadly wound of their heart and conscience and the deep recesses of the subtle mischief, let them blush even to ask; except, again, that it is a matter of greater risk and shame not to have besought the aid of peace. …

Epistle XXX ↗

Bonaventure

From which appears the equity of retribution with respect to those who confess: and so that nothing be lacking, the equity with respect to those who deny is shown, when he adds: But he who shall have denied me before men shall be denied before the Angels of God, namely when the Lord will say that word from Matthew twenty-five: "I know you not," etc. Whence above, in the ninth chapter: "He who shall have been ashamed of me and of my words, him shall the Son of man be ashamed of," etc. …

Commentary on Luke, Chapter 12 ↗