Matthew 26:34

“Jesus said unto him, verily I say unto thee, etc.] Christ, the more strongly to asseverate what he was about to say, uses the word verily, or prefixes his “Amen” to it, as being a certain truth, and what Peter might assure himself of would certainly come to pass: that this night before the cock crow, thou shalt deny me thrice; which is, as if he should say, thou wilt not only be offended because of me, and flee from me, and be scattered with the rest, as will be the case of all of you; but thou wilt deny that thou knowest me, that thou belongest to me, or hast any concern with me; and this thou wilt do not only once, but again and again, even three times, one after another, and that this…”

“Jesus foretells the fall of Peter - This is also recorded in Mark 14:27-31; Luke 22:31-34; John 13:34-38. Matthew 26:31 Then saith Jesus unto them - The occasion of his saying this was Peter’s bold affirmation that he was ready to die with him, John 13:36 Jesus had told them that he was going away - that is, was about to die. Peter asked him whither he was going. Jesus replied that he could not follow him then, but should afterward. Peter, not satisfied with that, said that he was ready to lay down his life for him. Then Jesus distinctly informed them that all of them would forsake him that very night. All ye shall be offended because of me - See the notes at Matthew 5:29. This language…”

“Before cock crowing thou wilt deny me thrice - That is, before three in the morning, the usual time of cock crowing: although one cock was heard to crow once, after Peter's first denial of his Lord. Matthew 26:35”

“That: Mar 14:30, Mar 14:31; Luk 22:34; Joh 13:38 Matthew 26:35”