As you rejoiced when the inheritance of the house of Israel became desolate, so will I do to you. You will become a desolation, O Mount Seir, and so will all of Edom. Then they will know that I am the LORD.
KJV
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.
ASV
As thou didst rejoice over 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 Edom, even all of it; and they shall know that I am Jehovah.