Mark 14:68
But he denied, saying, I neither know, nor understand what thou sayest: and he went out into the porch; and the cock crew.
Matthew 26:71-72
And when he was gone out into the porch, another maid'saw him, and saith unto them that were there, This man also was with Jesus of Nazareth.
Mark 14:29-31
But Peter said unto him, Although all shall be offended, yet will not I.
Mark 14:72
And straightway the second time the cock crew. And Peter called to mind the word, how that Jesus said unto him, Before the cock crow twice, thou shalt deny me thrice. And when he thought thereon, he wept.
John 13:36-38
Simon Peter saith unto him, Lord, whither goest thou? Jesus answered, Whither I go, thou canst not follow now; but thou shalt follow afterwards.
2 Timothy 2:12-13
if we endure, we shall also reign with him: if we shall deny him, he also will deny us: