2 Chronicles 18:3, 29-32

“Will you go with me to Ramoth-gilead?” King Ahab of Israel asked King Jehoshaphat of Judah. Jehoshaphat replied, “Why, of course! You and I are as one, and my troops are your troops. We will certainly join you in battle.”

The king of Israel 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 the king of Israel disguised himself, and they went into battle. Meanwhile, the king of Aram had issued these orders to his chariot commanders: “Attack only the king of Israel! Don’t bother with anyone else.” So when the Aramean chariot commanders saw Jehoshaphat in his royal robes, they went after him. “There is the king of Israel!” they shouted. But Jehoshaphat called out, and the LORD saved him. God helped him by turning the attackers away from him. As soon as the chariot commanders realized he was not the king of Israel, they stopped chasing him.