Augustine of Hippo, on Matt 26:69

“But Peter sat without in the court: and there came to him a servant maid, saying: Thou also wast with Jesus the Galilean.”

“(ubi sup.) The second denial was not outside the door, but after he had returned to the fire; for the second maid did not see him after he had gone out, but as he was going out; his getting up to go out drew her attention, and she said to them that were there, that is, to those that were standing round the fire in the hall, Tins fellow also was with Jesus of Nazareth. He who had gone out, haying heard this returned, that he might by denial vindicate himself. Or, as is more likely, he did not hear what was said of him as he went out, but it was after he came back that the maid, and the other man whom Luke mentions, said to him, And thou also art one of them.”

Imported from an open dataset — not yet checked against the printed edition.