2 Chronicles 20:20-30

20 Early the next morning the people went out to the wild country near Tekoa. As they were starting out, Jehoshaphat addressed them with these words: "People of Judah and Jerusalem! Put your trust in the Lord your God, and you will stand your ground. Believe what his prophets tell you, and you will succeed."
21 After consulting with the people, the king ordered some musicians to put on the robes they wore on sacred occasions and to march ahead of the army, singing: "Praise the Lord! His love is eternal!"
22 When they began to sing, the Lord threw the invading armies into a panic.
23 The Ammonites and the Moabites attacked the Edomite army and completely destroyed it, and then they turned on each other in savage fighting.
24 When the Judean army reached a tower that was in the desert, they looked toward the enemy and saw that they were all lying on the ground dead. Not one had escaped.
25 Jehoshaphat and his troops moved in to take the loot, and they found many cattle, supplies, clothing, and other valuable objects. They spent three days gathering the loot, but there was so much that they could not take everything.
26 On the fourth day they assembled in Beracah Valley and praised the Lord for all he had done. That is why the valley is called "Beracah."
27 Jehoshaphat led his troops back to Jerusalem in triumph, because the Lord had defeated their enemies.
28 When they reached the city, they marched to the Temple to the music of harps and trumpets.
29 Every nation that heard how the Lord had defeated Israel's enemies was terrified,
30 so Jehoshaphat ruled in peace, and God gave him security on every side.