2 Chronicles 20:20-24

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.

23The Ammonites and Moabites attacked the men from Mount Seir and annihilated them. When they had finished off the men of Seir, they attacked and destroyed one another.

24When the men of Judah arrived at the observation post overlooking the desert and looked at the huge army, they saw dead bodies on the ground; there were no survivors!