Bede the Venerable — as excerpted in the Catena Aurea on Mark 14:26-31

“(ubi sup.) Peter then promised in the ardour of his faith, and the Saviour as God knew what was to happen. Wherefore it goes on: And Jesus said unto him, Verily I say unto thee, that this day, even in this night, before the cock crow twice, thou shalt deny me thrice.”