1 Kings 22:29-33

29So the king of Israel and Jehoshaphat the king of Judah went up to Ramoth Gilead.

30And the king of Israel said to Jehoshaphat, “I will disguise myself and go into battle; but you put on your robes.” So the king of Israel disguised himself and went into battle.

31Now the king of Syria had commanded the thirty-two captains of his chariots, saying, “Fight with no one small or great, but only with the king of Israel.”

32So it was, when the captains of the chariots saw Jehoshaphat, that they said, “Surely it is the king of Israel!” Therefore they turned aside to fight against him, and Jehoshaphat cried out.

33And it happened, when the captains of the chariots saw that it was not the king of Israel, that they turned back from pursuing him.