Ambrose of Milan
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.
Peter denied, because he promised rashly. He does not deny on the mount, nor in the temple, nor in his own house, but in the judgment-hall of the Jews. There he denies where Jesus was bound, where truth is not. And denying Him he says, I know him not. It were presumptuous to say that he knew Him whom the human mind can not grasp. For no one knoweth the Son but the Father. (Matt. 11:17). Again, a second time he denies Christ; for it follows, And after a little while another saw him, and said, Thou wert also one of them.