2 Chronicles 20:22 (KJV)
And when they began to sing and to praise the LORD set ambushments against the children of Ammon Moab and mount Seir which were come against Judah and they were smitten
And when they began to sing and to praise the LORD set ambushments against the children of Ammon Moab and mount Seir which were come against Judah and they were smitten