Mark 14:68
But he denied it: "I don't even understand what you're talking about!" Then he went out to the gateway, and a rooster crowed.
Matthew 26:71-72
When he went out to the gateway, another slave girl saw him and said to the people there, "This man was with Jesus the Nazarene."
Mark 14:29-31
Peter said to him, "Even if they all fall away, I will not!"
Mark 14:72
Immediately a rooster crowed a second time. Then Peter remembered what Jesus had said to him: "Before a rooster crows twice, you will deny me three times." And he broke down and wept.
John 13:36-38
Simon Peter said to him, "Lord, where are you going?" Jesus replied, "Where I am going, you cannot follow me now, but you will follow later."
2 Timothy 2:12-13
If we endure, we will also reign with him. If we deny him, he will also deny us.