2 Chronicles 20:23

19 And the Levites from the Kohathites and Korahites stood up to praise the LORD, the God of Israel, shouting in a very loud voice.

20 Early in the morning they got up and left for the Wilderness of Tekoa. As they set out, Jehoshaphat stood up and said, “Hear me, O people of Judah and Jerusalem. Believe in the LORD your God, and you will be upheld; believe in His prophets, and you will succeed.”

21 Then Jehoshaphat consulted with the people and appointed those who would sing to the LORD and praise the splendor of His holiness. As they went out before the army, they were singing: “Give thanks to the LORD, for His loving devotion endures forever.”

22 The moment they began their shouts and praises, the LORD set ambushes against the men of Ammon, Moab, and Mount Seir who had come against Judah, and they were defeated.

23 The Ammonites and Moabites rose up against the inhabitants of Mount Seir, devoting them to destruction. And when they had made an end to the inhabitants of Seir, they helped to destroy one another.

24 When the men of Judah came to a place overlooking the wilderness, they looked for the vast army, but there were only corpses lying on the ground; no one had escaped.

25 Then Jehoshaphat and his people went to carry off the plunder, and they found on the bodies an abundance of goods and valuables—more than they could carry away. They were gathering the plunder for three days because there was so much.

26 On the fourth day they assembled in the Valley of Beracah, where they blessed the LORD. Therefore that place is called the Valley of Beracah to this day.

27 Then all the men of Judah and Jerusalem, with Jehoshaphat at their head, returned joyfully to Jerusalem, for the LORD had made them rejoice over their enemies.

Read all of 2 Chronicles 20