1 Kings 22:31-33

31And the king of Syria commanded the thirty-two captains of his chariots saying, Fight neither with small nor great, but with the king of Israel only.

32And it came to pass when the captains of the chariots saw Jehoshaphat, that they said, Surely that is the king of Israel; and they turned against him to fight; and Jehoshaphat cried out.

33And it came to pass that when the captains of the chariots perceived that it was not the king of Israel, they turned back from pursuing him.