Cross reference
Luke 22:60
60 and Peter said, `Man, I have not known what thou sayest;' and presently, while he is speaking, a cock crew.
Matthew 26:74-75
74 Then began he to anathematise, and to swear -- `I have not known the man;' and immediately did a cock crow,
75 and Peter remembered the saying of Jesus, he having said to him -- `Before cock-crowing, thrice thou wilt deny me;' and having gone without, he did weep bitterly.
Mark 14:71-72
71 and he began to anathematize, and to swear -- `I have not known this man of whom ye speak;'
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.
Luke 22:34
34 and he said, `I say to thee, Peter, a cock shall not crow to-day, before thrice thou mayest disown knowing me.'
John 18:27
27 again, therefore, Peter denied, and immediately a cock crew.