II Chronicles 20:20-30

So 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 His prophets, and you shall prosper.” And when he had consulted with the people, he appointed those who should sing to the LORD, and who should praise the beauty of holiness, as they went out before the army and were saying: “Praise the LORD, For His mercy endures forever.” Now when they began to sing and to praise, the LORD set ambushes against the people of Ammon, Moab, and Mount Seir, who had come against Judah; and they were defeated. For the people of Ammon and Moab stood up against the inhabitants of Mount Seir to utterly kill and destroy them. And when they had made an end of the inhabitants of Seir, they helped to destroy one another. So when Judah came to a place overlooking the wilderness, they looked toward the multitude; and there were their dead bodies, fallen on the earth. No one had escaped. When Jehoshaphat and his people came to take away their spoil, they found among them an abundance of valuables on the dead bodies, and precious jewelry, which they stripped off for themselves, more than they could carry away; and they were three days gathering the spoil because there was so much. And on the fourth day they assembled in the Valley of Berachah, for there they blessed the LORD; therefore the name of that place was called The Valley of Berachah until this day. Then they returned, every man of Judah and Jerusalem, with Jehoshaphat in front of them, to go back to Jerusalem with joy, for the LORD had made them rejoice over their enemies. So they came to Jerusalem, with stringed instruments and harps and trumpets, to the house of the LORD. And the fear of God was on all the kingdoms of those countries when they heard that the LORD had fought against the enemies of Israel. Then the realm of Jehoshaphat was quiet, for his God gave him rest all around.