Mark 14:68
But Peter denied it. "I do not know or understand what you mean," he replied. Then he went out into the porch;
Matthew 26:71-72
When he had gone out into the gateway, another maid saw him, and said to those who were there: "This man was with Jesus of Nazareth!"
Mark 14:29-31
"Even if every one else falls away," said Peter, "yet I shall not."
Mark 14:72
At that moment, for the second time, a cock crowed; and Peter remembered the words that Jesus had said to him-- 'Before a cock has crowed twice, you will disown me three times'; and, as he thought of it, he began to weep.
John 13:36-38
"Where are you going, Master?" asked Peter. "I am going where you cannot now follow me," answered Jesus, "but you shall follow me later."
2 Timothy 2:12-13
If we continue to endure, we shall also share his throne. If we should ever disown him, he, too, will disown us.