'Cock crow' in the Bible

when Peter remembred what Jesus had said to him, "before the cock crow, thou shalt deny me thrice." and he went out, and wept bitterly.

Jesus said to him, verily I tell thee, to-day, even this night, before the cock crow twice, you will renounce 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 the cock crowed for the second time. then Peter calling to mind that expression of Jesus, "before the cock crow twice, thou shalt deny me thrice," he cover'd his head and wept.