Augustine of Hippo
Catena Aurea · Lukasevangelium 22
Then took they him, and led him, and brought him into the high priest’s house. And Peter followed affar off. And when they had kindled a fire in the midst of the hall, and were set down together, Peter sat down among them. But a certain maid beheld him as he sat by the fire, and earnestly looked upon him, and said, This man was also with him. And he denied him, saying, Woman, I know him not. And after a little while another saw him, and said, Thou art also of them. And Peter said, Man, I am not. And about, the space of one hour after another confidently affirmed, saying, Of a truth this fellow also was with him: for he is a Galilæan. And Peter said, Man, I know not what thou sayest. And immediately, while he yet spake, the cock crew. And the Lord turned, and looked upon Peter. And Peter remembered the word of the Lord, how he had said unto him, Before the cock crow, thou shalt deny me thrice. And Peter went out, and wept bitterly.
(de Con. Ev. lib. iii. c. 6.) And it is supposed that in the second denial he was addressed by two persons, namely, by the maid whom Matthew and Mark mention, and by another whom Luke speaks of. With respect then to what Luke here relates, And after a little while, &c. Peter had already gone out of the gate, and the cock had crowed the first time, as Mark says; and now he had returned, that, as John says, he might again deny standing by the fire. Of which denial it follows, And Peter said, Man, I am not.