II Chronicles 20:19

When a vast army of Moabites and Ammonites came against Judah, Jehoshaphat proclaimed a fast and prayed before the LORD, and the Spirit came upon Jahaziel, who prophesied that the battle belonged to God. As Judah went out singing praises, the LORD set ambushments against the invaders so that they destroyed one another, and Judah gathered abundant spoil without having to fight.