Augustine of Hippo
Catena Aurea · Johannesevangelium 13
Simon Peter said unto him, Lord, whither goest thou? Jesus answered him, Whither I go, thou canst not follow me now; but thou shalt follow me afterwards. Peter said unto him, Lord, why cannot I follow thee now? I will lay down my life for thy sake. Jesus answered him, Wilt thou lay down thy life for my sake? Verily, verily, I say unto thee, The cock shall not crow, till thou hast denied me thrice.
(de Con. Evang. iii. c. 2. [5.]) This speech, The cock shall not crow, occurs in all the Evangelists, but not at the same time in all. Matthew and Mark introduce it after they have left the house, in which they were eating; Luke and John before. We may suppose either that the two former are recurring to what had passed, or the two latter anticipating what is coming. Or the great difference not only of the words, but of the subjects which precede the speech, and which excite Peter to the presumption of offering to die, for or with our Lord, may lead us to conclude that he made this offer three times, and that our Lord three times replied, Before the cock crow, thou shalt deny Me thrice.