Charles Spurgeon Commentary Luke 22:32-34

"but I made supplication for thee, that thy faith fail not; and do thou, when once thou hast turned again, establish thy brethren. And he said unto him, Lord, with thee I am ready to go both to prison and to death. And he said, I tell thee, Peter, the cock shall not crow this day, until thou shalt thrice deny that thou knowest me." — Luke 22:32-34 (ASV)

But I have prayed for thee, that thy faith fail not: and when thou art converted, strengthen thy brethren. And he said unto him, Lord, I am ready to go with thee, both into prison, and to death. And he said, I tell thee, Peter, the cock shall not crow this day, before that thou shalt thrice deny that thou knowest me.

Though Peter did not really know himself, Christ knew him.

That is one of our comforts—that the Lord Jesus Christ foresees all future adversity and so provides against it. He looks down into our nature and deals with us as we need to be dealt with. It is well for us that we are in his hands.