Matthew 26:72 KJV

And again he denied with an oath, I do not know the man.
Matthew 26:72, King James Version

In context

71 And when he was gone out into the porch, another maid saw him, and said unto them that were there, This fellow was also with Jesus of Nazareth.

72 And again he denied with an oath, I do not know the man.

73 And after a while came unto him they that stood by, and said to Peter, Surely thou also art one of them; for thy speech bewrayeth thee.