2 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
Chapter 18
29and the king of Israel saith unto Jehoshaphat to disguise himself, and to go into battle, `And thou, put on thy garments.' And the king of Israel disguiseth himself, and they go into battle.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.