Idumea in the Bible

As thou didst rejoice at the inheritance of the house of Israel, because it was desolate, so will I do unto thee: thou shalt be desolate, O mount Seir, and all Idumea, even all of it: and they shall know that I am the LORD.

Therefore thus saith the Lord GOD; Surely in the fire of my jealousy have I spoken against the residue of the heathen, and against all Idumea, which have appointed my land into their possession with the joy of all their heart, with despiteful minds, to cast it out for a prey.