Cross reference
Matthew 26:34
34 Jesus said unto him, Verily I say unto thee, that this night, before the cock crow, thou shalt deny me thrice.
John 13:38
38 Jesus answereth, Wilt thou lay down thy life for me? Verily, verily, I say unto thee, The cock shall not crow, till thou hast denied me thrice.
Luke 22:34
34 And he said, I tell thee, Peter, the cock shall not crow this day, until thou shalt thrice deny that thou knowest me.
Matthew 26:75
75 And Peter remembered the word which Jesus had said, Before the cock crow, thou shalt deny me thrice. And he went out, and wept bitterly.
Mark 14:30-31
30 And Jesus saith unto him, Verily I say unto thee, that thou to-day, `even' this night, before the cock crow twice, shalt deny me thrice.
31 But he spake exceedingly vehemently, If I must die with thee, I will not deny thee. And in like manner also said they all.