Mark 14:68
But he denied, saying, I know not, neither do I understand what thou sayest. And he went out into the porch; and the cock crowed.
Matthew 26:71-72
And when he had gone out into the porch, another maid saw him, and said to them that were there, This man was also with Jesus of Nazareth.
Mark 14:29-31
But Peter said to him, Although all shall be offended, yet will not I.
Mark 14:72
And the second time the cock crowed. And Peter called to mind the word that Jesus said to him, Before the cock shall crow twice, thou wilt deny me thrice. And when he thought thereon, he wept.
John 13:36-38
Simon Peter said to him, Lord, whither goest thou? Jesus answered him, Whither I go, thou canst not follow me now; but thou shalt follow me afterward.
2 Timothy 2:12-13
If we suffer, we shall also reign with him: if we deny him, he also will deny us: