1 Kings 22:4

22:4 Then he said to Jehoshaphat, “Will you go with me to attack Ramoth Gilead?” Jehoshaphat replied to the king of Israel, “I will support you; my army and horses are at your disposal.”

1 Kings 22:32-33

22:32 When the chariot commanders saw Jehoshaphat, they said, “He must be the king of Israel.” So they turned and attacked him, but Jehoshaphat cried out. 22:33 When the chariot commanders realized he was not the king of Israel, they turned away from him.