John 18:10-11, 25-27

Then Simon Peter having a sword drew it, and smote the high priest's servant, and cut off his right ear. The servant's name was Malchus. Then said Jesus unto Peter, Put up thy sword into the sheath: the cup which my Father hath given me, shall I not drink it?

And Simon Peter stood and warmed himself. They said therefore unto him, Art not thou also one of his disciples? He denied it, and said, I am not. One of the servants of the high priest, being his kinsman whose ear Peter cut off, saith, Did not I see thee in the garden with him? Peter then denied again: and immediately the cock crew.