2 Chronicles 20

21 And he consulted with the people, and appointed singers to Jehovah, and those that should praise in holy splendour, as they went forth before the armed men, and say, Give thanks to Jehovah; for his loving-kindness endureth for ever! 22 And when they began the song of triumph and praise, Jehovah set liers-in-wait against the children of Ammon, Moab, and mount Seir, who had come against Judah, and they were smitten.