'Cock crow' in the Bible
Jesus said unto him, "Verily I say unto thee, that this same night, before the cock crow, thou shalt deny me thrice."
Then began he to anathematise, and to swear -- 'I have not known the man;' and immediately did a cock crow,
And Peter remembered the words of Jesus, which he said unto him, "Before the cock crow, thou shalt deny me thrice": and went out at the doors and wept bitterly.
Watch therefore, for ye do not know when the master of the house comes: evening, or midnight, or cock-crow, or morning;
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.
but he denied it, saying, I don't know him, neither am I acquainted with any such you mention. and he went out into the porch, when the cock crow'd.
And straightway the second time the cock crew. And Peter called to mind the word, how that Jesus said unto him, Before the cock crow twice, thou shalt deny me thrice. And when he thought thereon, he wept.
And the Lord, turning round, looked upon Peter. And Peter remembered the word of the Lord, how he had said to him, That before the cock crow, thou shalt deny me thrice.
Jesus answereth - Thy life, in my behalf, wilt thou lay down? Verily, verily, I say unto thee - In nowise shall a cock crow till thou hast denied me, thrice.