Cross reference
Mark 14:68
68 and he denied, saying, `I have not known `him', neither do I understand what thou sayest;' and he went forth without to the porch, and a cock crew.
Matthew 26:71-72
71 And he having gone forth to the porch, another female saw him, and saith to those there, `And this one was with Jesus of Nazareth;'
72 and again did he deny with an oath -- `I have not known the man.'
Mark 14:29-31
29 And Peter said to him, `And if all shall be stumbled, yet not I;'
30 And Jesus said to him, `Verily I say to thee, that to-day, this night, before a cock shall crow twice, thrice thou shalt deny me.'
31 And he spake the more vehemently, `If it may be necessary for me to die with thee -- I will in nowise deny thee;' and in like manner also said they all.
Mark 14:72
72 and a second time a cock crew, and Peter remembered the saying that Jesus said to him -- `Before a cock crow twice, thou mayest deny me thrice;' and having thought thereon -- he was weeping.
John 13:36-38
36 Simon Peter saith to him, `Sir, whither dost thou go away?' Jesus answered him, `Whither I go away, thou art not able now to follow me, but afterward thou shalt follow me.'
37 Peter saith to him, `Sir, wherefore am I not able to follow thee now? my life for thee I will lay down;'
38 Jesus answered him, `Thy life for me thou wilt lay down! verily, verily, I say to thee, a cock will not crow till thou mayest deny me thrice.'
2 Timothy 2:12-13
12 if we do endure together -- we shall also reign together; if we deny `him', he also shall deny us;
13 if we are not stedfast, he remaineth stedfast; to deny himself he is not able.