Contradiction with Matthew 26:35
This verse states Peter's strong allegiance and determination not to deny Jesus, which contrasts with the events in John 18:15 where Peter follows Jesus but later denies Him.
Matthew 26:35: Peter said unto him, Though I should die with thee, yet will I not deny thee. Likewise also said all the disciples.
Contradiction with John 13:37-38
Peter expresses his willingness to lay down his life for Jesus, contradicting his actions in John 18:15 where he follows Jesus but ultimately denies his association under pressure.
John 13:37-38: Peter said unto him, Lord, why cannot I follow thee now? I will lay down my life for thy sake.
Contradiction with Mark 14:31
Peter vehemently insists he will not deny Jesus even if it means dying with Him, which contradicts the cautious and fearful behavior implied in John 18:15 where Peter follows Jesus but then denies knowing Him.
Mark 14:31: But he spake the more vehemently, If I should die with thee, I will not deny thee in any wise. Likewise also said they all.
Contradiction with Luke 22:33
Peter boldly claims he is ready to go with Jesus to prison and death, contrasting with the caution he shows in John 18:15 following afar off and later denying Jesus.
Luke 22:33: And he said unto him, Lord, I am ready to go with thee, both into prison, and to death.
Contradiction with Proverbs 29:25
This verse discusses the fear of man bringing a snare, which contrasts with Peter's fearfulness in John 18:15 and subsequent denial which ensnares him in contradiction to his earlier declarations of loyalty.
Proverbs 29:25: The fear of man bringeth a snare: but whoso putteth his trust in the LORD shall be safe. [safe: Heb. set on high]