2 Chronicles 20:19-22

19Then some Levites, from the Kohathites and Korahites, got up and loudly praised the Lord God of Israel.

20Early the next morning they marched out to the Desert of Tekoa. When they were ready to march, Jehoshaphat stood up and said: “Listen to me, you people of Judah and residents of Jerusalem! Trust in the Lord your God and you will be safe! Trust in the message of his prophets and you will win.”

21He met with the people and appointed musicians to play before the Lord and praise his majestic splendor. As they marched ahead of the warriors they said: “Give thanks to the Lord, for his loyal love endures.”

22When they began to shout and praise, the Lord suddenly attacked the Ammonites, Moabites, and men from Mount Seir who were invading Judah, and they were defeated.