John 18:27
Again Peter denied it. And at that moment the cock crowed — Peter's third denial (arneisthai, to deny) fulfills Jesus' prediction (13:38), while the cock's crow marks the moment of recognition. The simple statement "the cock crowed" carries no theological commentary; John leaves the reader to contemplate Peter's awareness of his failure. In 21:9, the charcoal fire returns as the scene of restoration.