the cock
Luke 22:34
And he said, I tell thee, Peter, the cock shall not crow this day, before that thou shalt thrice deny that thou knowest me.
Matthew 26:74
Then began he to curse and to swear, saying, I know not the man. And immediately the cock crew.
Matthew 26:75
And Peter remembered the word of Jesus, which said unto him, Before the cock crow, thou shalt deny me thrice. And he went out, and wept bitterly.
Mark 14:71
But he began to curse and to swear, saying, I know not this man of whom ye speak.
Mark 14:72
And the second time the cock crew. And Peter called to mind the word that Jesus said unto him, Before the cock crow twice, thou shalt deny me thrice. And when he thought thereon, he wept.
John 18:27
Peter then denied again: and immediately the cock crew.