2 Chronicles 18:28-32
18:28 The king of Israel and King Jehoshaphat of Judah attacked Ramoth Gilead.
18:29 The king of Israel said to Jehoshaphat, “I will disguise myself and then enter the battle; but you wear your royal attire.” So the king of Israel disguised himself and they entered the battle.
18:30 Now the king of Syria had ordered his chariot commanders, “Do not fight common soldiers or high ranking officers; fight only the king of Israel!”
18:31 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. The Lord helped him; God lured them away from him.
18:32 When the chariot commanders realized he was not the king of Israel, they turned away from him.