Mark 14:68
But he denied, saying, I know not nor understand what thou sayest. And he went out into the vestibule; and a cock crew.
Matthew 26:71-72
And when he had gone out into the entrance, another maid saw him, and says to those there, This man also was with Jesus the Nazaraean.
Mark 14:29-31
But Peter said to him, Even if all should be offended, yet not I.
Mark 14:72
And the second time a cock crew. And Peter remembered the word that Jesus said to him, Before the cock crow twice, thou shalt deny me thrice; and when he thought thereon he wept.
John 13:36-38
Simon Peter says to him, Lord, where goest thou? Jesus answered him, Where I go thou canst not follow me now, but thou shalt follow me after.
2 Timothy 2:12-13
if we endure, we shall also reign together; if we deny, he also will deny us;