Divrey Hayamim Bais 20:22

22 And when they began with rinnah and tehillah, Hashem set me’arevim (ambushers) against the Bnei Ammon, Moav, and Mt Seir, which were come against Yehudah, and they were struck down.

Divrey Hayamim Bais 20:22 Meaning and Commentary

2 Chronicles 20:22

And when they began to sing and to praise
They sung more or less all the way they went, from the time they set out, but when they came nearer the enemy, they sung louder and louder: the Lord set ambushments against the children of Ammon, Moab, and Mount
Seir, which came against Judah;
some take them to be their own ambushments, which they set for the destruction of Judah; but the Lord turned them against their own confederates, mistaking them for Jews; so the Vulgate Latin version,

``the Lord turned their ambushments against themselves;''

or rather these were angels, who appeared in the form of the Edomites, and so fell upon the Ammonites and Moabites: and they were smitten;
by them, many of them were destroyed; hence it follows,

Divrey Hayamim Bais 20:22 In-Context

20 And they rose early in the boker, and went forth into the Midbar Tekoa; and as they went forth, Yehoshaphat stood and said, Hear me, O Yehudah, and ye inhabitants of Yerushalayim. Ha’aminu BaHashem Eloheichem (Believe in Hashem Eloheichem), so shall ye be established; have faith in His Nevi’im, so shall ye be victorious.

21 And when he had consulted with HaAm, he appointed meshorarim (singers) unto Hashem, and that should praise the hadrat kodesh, as they went out before the army, and to say, Hodu L’Adonoi ki l’olam chasdo (Give thanks to Hashem, for His mercy endureth forever).

22 And when they began with rinnah and tehillah, Hashem set me’arevim (ambushers) against the Bnei Ammon, Moav, and Mt Seir, which were come against Yehudah, and they were struck down.

23 For the Bnei Ammon and Moav stood up against the inhabitants of Mt Seir, utterly to slay and destroy them. And when they had made an end of the inhabitants of Seir, every one helped to destroy another.

24 And when Yehudah came toward the mitzpeh (guard tower) in the midbar, they looked toward the multitude, and, hinei, they were pegarim (corpses) fallen on the ground, and there was no escapee.