22 When they began to sing and to praise, Yahweh set ambushers against the children of Ammon, Moab, and Mount Seir, who had come against Judah; and they were struck. 23 For the children of Ammon and Moab stood up against the inhabitants of Mount Seir, utterly to kill and destroy them: and when they had made an end of the inhabitants of Seir, everyone helped to destroy another. 24 When Judah came to the place overlooking the wilderness, they looked at the multitude; and behold, they were dead bodies fallen to the earth, and there were none who escaped. 25 When Jehoshaphat and his people came to take the spoil of them, they found among them in abundance both riches and dead bodies, and precious jewels, which they stripped off for themselves, more than they could carry away: and they were three days in taking the spoil, it was so much. 26 On the fourth day they assembled themselves in the valley of Beracah; for there they blessed Yahweh: therefore the name of that place was called The valley of Beracah to this day. 27 Then they returned, every man of Judah and Jerusalem, and Jehoshaphat in the forefront of them, to go again to Jerusalem with joy; for Yahweh had made them to rejoice over their enemies. 28 They came to Jerusalem with stringed instruments and harps and trumpets to the house of Yahweh. 29 The fear of God was on all the kingdoms of the countries, when they heard that Yahweh fought against the enemies of Israel. 30 So the realm of Jehoshaphat was quiet; for his God gave him rest all around.

Matthew Henry's Commentary on 2 Chronicles 20:22-30

Commentary on 2 Chronicles 20:20-30

(Read 2 Chronicles 20:20-30)

Jehoshaphat exhorted his troops to firm faith in God. Faith inspires a man with true courage; nor will any thing help more to the establishing of the heart in shaking times, than a firm belief of the power, and mercy, and promise of God. In all our trust in the Lord, and our praises of him, let us especially look at his everlasting mercy to sinners through Jesus Christ. Never was an army so destroyed as that of the enemy. Thus God often makes wicked people destroy one another. And never was a victory celebrated with more solemn thanksgivings.