2 Chronicles 18:29

18:29 The king of Israel said to Jehoshaphat, I will disguise myself, and go into the battle; but put you on your robes. So the king of Israel disguised himself; and they went into the battle.
-World English Bible

Other Translation

18:29 And the king of Israel said unto Jehoshaphat, I will disguise myself, and will go to the battle; but put thou on thy robes. So the king of Israel disguised himself; and they went to the battle.
-King James Version