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.
Lastly, those whom Jesus looks upon weep for their sins. Hence it follows, And Peter remembered the word of the Lord, how he had said to him, Before the cock crow, thou shalt deny me thrice. And he went out, and wept bitterly. Why did he weep? Because he sinned as man. I read of his tears, I do not read of his confession. Tears wash away an offence which it is shame to confess in words. The first and second time he denied and wept not, for as yet our Lord had not looked upon him. He denied the third time, Jesus looked upon him, and he wept bitterly. So then if thou wilt obtain pardon, wash away thy guilt in tears.