when
Mark 14:68
But he denied, saying, I know not, neither understand I what thou sayest. And he went out into the porch; and the cock crew.
Mark 14:69
And a maid saw him again, and began to say to them that stood by, This is one of them.
Luke 22:58
And after a little while another saw him, and said, Thou art also of them. And Peter said, Man, I am not.
John 18:25-27
25
And Simon Peter stood and warmed himself. They said therefore unto him, Art not thou also one of his disciples? He denied it, and said, I am not.
26
One of the servants of the high priest, being his kinsman whose ear Peter cut off, saith, Did not I see thee in the garden with him?
27
Peter then denied again: and immediately the cock crew.