During the trial Peter denied his master. What had Jesus predicted concerning his denial?

Matthew, Luke and John: “Jesus said unto him, Verily I say unto thee, that this night, before the cock crow, thou shalt deny me thrice” (Matt. xxvi, 34; Luke xxii, 34; John xiii, 38).

Mark: “And Jesus saith unto him, Verily I say unto thee, that this day, even in this night, before the cock crow twice, thou shalt deny me thrice” (xiv, 30).