Divrey Hayamim Bais 20:21-22

Orthodox Jewish Bible

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.