2 Chronicles 18:28-32

28So the king of Israel and Jehoshaphat the king of Judah went up to Ramoth-gilead. 29And the king of Israel said unto Jehoshaphat, I will disguise myself, and go into the battle; but put thou on thy robes. So the king of Israel disguised himself; and they went into the battle. 30Now the king of Syria had commanded the captains of his chariots, saying, Fight neither with small nor great, save only with the king of Israel. 31And it came to pass, when the captains of the chariots saw Jehoshaphat, that they said, It is the king of Israel. Therefore they turned about to fight against him: but Jehoshaphat cried out, and Jehovah helped him; and God moved them to depart from him. 32And it came to pass, when the captains of the chariots saw that it was not the king of Israel, that they turned back from pursuing him.