2 Chronicles 20:10

20:10 Now the Ammonites, Moabites, and men from Mount Seir are coming! When Israel came from the land of Egypt, you did not allow them to invade these lands. They bypassed them and did not destroy them.

2 Chronicles 20:23

20:23 The Ammonites and Moabites attacked the men from Mount Seir and annihilated them. When they had finished off the men of Seir, they attacked and destroyed one another.