Contradiction with Matthew 3:14
John the Baptist expresses reluctance to baptize Jesus, while in John 13:9, Peter requests more than what is being offered.
Matthew 3:14: But John forbad him, saying, I have need to be baptized of thee, and comest thou to me?
Contradiction with Matthew 15:11
Jesus indicates that external actions don't defile a person, whereas in John 13:9, Peter emphasizes physical washing.
Matthew 15:11: Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.
Contradiction with Mark 10:45
Jesus speaks about servanthood, yet Peter's response in John 13:9 presumes a misunderstanding of spiritual significance.
Mark 10:45: For even the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.
Contradiction with Luke 22:26
Jesus teaches that the greatest should be like the youngest, contrasting with Peter's insistence on receiving more in John 13:9.
Luke 22:26: But ye [shall] not [be] so: but he that is greatest among you, let him be as the younger; and he that is chief, as he that doth serve.
Contradiction with Galatians 5:2
Paul warns about returning to old laws, while Peter in John 13:9 focuses on the traditional act of washing.
Galatians 5:2: Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing.