Contradiction with Proverbs 27:2
Acts 12:16 emphasizes recognition and astonishment at Peter's presence, while Proverbs 27:2 advises letting others praise you, not your own mouth, contrasting self-promotion with silent acknowledgment.
Proverbs 27:2: Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.
Contradiction with John 20:29
Acts 12:16 highlights astonishment at seeing Peter, but John 20:29 contrasts this with the blessedness of those who believe without seeing.
John 20:29: Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed [are] they that have not seen, and [yet] have believed.
Contradiction with Acts 12:7
Acts 12:7 describes an angel freeing Peter quietly and miraculously, contrasting with Acts 12:16 where there is an audible commotion as Peter knocks.
Acts 12:7: And, behold, the angel of the Lord came upon [him], and a light shined in the prison: and he smote Peter on the side, and raised him up, saying, Arise up quickly. And his chains fell off from [his] hands.