'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 word of Jesus, who had said to him, Before the cock crow thou shalt deny me thrice. And he went forth without, and wept bitterly.