2 Chronicles 20 23
The men of Ammon and Moab turned on the men from Mount Seir, killing all of them. Once they'd finished wiping out the army from Seir, they turned on each other, destroying themselves.
Compare with other 3 random translations
KJV 2 Chronicles 20:23For the children of Ammon and Moab stood up against the inhabitants of mount Se´ir, utterly to slay and destroy them: and when they had made an end of the inhabitants of Se´ir, every one helped to destroy another.
ASV 2 Chronicles 20:23For the children of Ammon and Moab stood up against the inhabitants of mount 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.
NLT 2 Chronicles 20:23The armies of Moab and Ammon turned against their allies from Mount Seir and killed every one of them. After they had destroyed the army of Seir, they began attacking each other.