Charles Ellicott Commentary Luke 22:61

"And the Lord turned, and looked upon Peter. And Peter remembered the word of the Lord, how that he said unto him, Before the cock crow this day thou shalt deny me thrice." — Luke 22:61 (ASV)

And the Lord turned, and looked upon Peter. This glance, which was therefore the turning point of Peter’s life, is mentioned only by St. Luke. As Peter was sitting in the porch, our Lord must have looked at the disciple as He was being led from Annas to the more public trial before the Sanhedrin.

The way this fact is narrated, using the phrase “the Lord turned,” probably indicates, as in other instances, that St. Luke gathered this detail from his informants at a time when that way of naming Him had become habitual. It was possibly also in response to inquiries (natural for someone who sought to analyze the motives behind actions) about what had brought about the change that led Peter, in a moment, from the curses of denial to the tears of penitence.