2 Chronicles 20:20-22World English Bible (WEB)
20 They rose early in the morning, and went out into the wilderness of Tekoa: and as they went out, Jehoshaphat stood and said, “Listen to me, Judah, and you inhabitants of Jerusalem! Believe in Yahweh your God, so you shall be established! Believe his prophets, so you shall prosper.”
21 When he had taken counsel with the people, he appointed those who should sing to Yahweh, and give praise in holy array, as they went out before the army, and say, Give thanks to Yahweh; for his loving kindness endures forever. 22 When they began to sing and to praise, Yahweh set ambushers against the children of Ammon, Moab, and Mount Seir, who had come against Judah; and they were struck.
2 Chronicles 20:20-22Amplified Bible, Classic Edition (AMPC)
20 And they rose early in the morning and went out into the Wilderness of Tekoa; and as they went out, Jehoshaphat stood and said, Hear me, O Judah, and you inhabitants of Jerusalem! Believe in the Lord your God and you shall be established; believe and remain steadfast to His prophets and you shall prosper.
21 When he had consulted with the people, he appointed singers to sing to the Lord and praise Him in their holy [priestly] garments as they went out before the army, saying, Give thanks to the Lord, for His mercy and loving-kindness endure forever!
22 And when they began to sing and to praise, the Lord set ambushments against the men of Ammon, Moab, and Mount Seir who had come against Judah, and they were [self-] slaughtered;