2 Chronicles 20:20-24

20They rose early in the morning and went out to the wilderness of Tekoa; and when they went out, Jehoshaphat stood and said, “Listen to me, Judah and inhabitants of Jerusalem: 1Put your trust in the Lord your God and you will endure. Put your trust in His prophets, and succeed.” 21When he had consulted with the people, he appointed those who sang to the Lord and those who 2praised Him in holy attire, as they went out before the army and said, “3Give thanks to the Lord, for His faithfulness is everlasting.” 22When they began singing and praising, the Lord 4set ambushes against the sons of 5Ammon, Moab, and Mount Seir, who had come against Judah; so they were struck down. 23For the sons of Ammon and Moab rose up against the inhabitants of Mount Seir, completely destroying them; and when they had finished with the inhabitants of Seir, 6they helped to destroy one another.

24When Judah came to the watchtower of the wilderness, they turned toward the multitude, and behold, they were corpses lying on the ground, and there was no survivor.