1 Kings 22:29

29. So the king of Israel and King Jehoshaphat of Judah led their armies against Ramoth-gilead.
30. Now King Ahab said to Jehoshaphat, "As we go into battle, I will disguise myself so no one will recognize me, but you wear your royal robes." So Ahab disguised himself, and they went into battle.
31. Now the king of Aram had issued these orders to his thirty-two charioteers: "Attack only the king of Israel!"
32. So when the Aramean charioteers saw Jehoshaphat in his royal robes, they went after him. "There is the king of Israel!" they shouted. But when Jehoshaphat cried out,
33. the charioteers realized he was not the king of Israel, and they stopped chasing him.