Verse 2
Set thy face against Mount Seir - That is, against the Edomites. This prophecy was probably delivered about the time of the preceding, and before the destruction of Idumea by Nebuchadnezzar, which took place about five years after.
Calmet supposes that two destructions of Idumea are here foretold; one by Nebuchadnezzar, and the other by the Jews after their return from their captivity.