'Cock crowing' in the Bible

Jesus said to him, 'Verily I say to thee, that, this night, before cock-crowing, thrice thou wilt deny me.'

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.

watch ye, therefore, for ye have not known when the lord of the house doth come, at even, or at midnight, or at cock-crowing, or at the morning;