Theophylact of Ohrid — as excerpted in the Catena Aurea on Luke 22:31-34

“He burns forth indeed with too much love, and promises what is impossible to him. But it behoved him as soon as he heard from the Truth that he was to be tempted, to be no longer confident. Now the Lord, seeing that Peter spoke boastfully, reveals the nature of his temptation, namely, that he would deny Him; I tell thee, Peter, the cock shall not crow this day, before that thou thrice deny, &c.”