Zedekiah

When King Ahab of Israel calls the prophets to divine whether he and King Jehoshaphat of Judah should go to war with Syria, one of the four hundred prophets he summons is Zedekiah. Zedekiah makes iron horns and wears them around, saying Ahab will destroy the Syrians (2 Chronicles 18:10).

Later, Micaiah shows up and informs Zedekiah that he’s been tricked by a messenger of God to convince Ahab to go up against the Syrians and be defeated and killed, Zedekiah smacks Micaiah (2 Chronicles 18:23), but it turns out he was right: Israel and Judah are defeated, and Ahab is killed (2 Chronicles 18:33–34).