2 Chronicles 20:23

Then the children of Ammon and Moab rose up against the dwellers in mount Seir, to destroy and consume them; and when they had made an end of [destroying] the inhabitants of Seir, they rose up against one another so that they were utterly destroyed.

For 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.

For the children of Ammon and Moab stood up against the inhabitants of Mount Seir to utterly kill and destroy them. When they had finished the inhabitants of Seir, everyone helped to destroy each other.