2 Chronicles 20:22-23

22And when they began to sing and praise, the Lord set aan ambush against the men of bAmmon, Moab, and Mount Seir, who had come against Judah, so that they were routed. 23For the men of Ammon and Moab rose against the inhabitants of Mount Seir, devoting them to destruction, and when they had made an end of the inhabitants of Seir, cthey all helped to destroy one another.

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