DouayRheims(i)
22 And when they began to sing praises, the Lord turned their ambushments upon themselves, that is to say, of the children of Ammon, and of Moab, and of mount Seir, who were come out to fight against Juda, and they were slain.
23 For the children of Ammon, and of Moab, rose up against the inhabitants of mount Seir, to kill and destroy them: and when they had made an end of them, they turned also against one another, and destroyed one another.