John Gill Commentary Obadiah 1:8

"Shall I not in that day, saith Jehovah, destroy the wise men out of Edom, and understanding out of the mount of Esau?" — Obadiah 1:8 (ASV)

Shall I not in that day, says the Lord, even destroy the wise
[men] out of Edom
When they shall be invaded by the enemy, and treacherously dealt with by their allies; so that there shall be no wise counsellors at court to give advice what proper methods should be taken at such a season; they should either be taken off by death, or their wisdom should be turned into folly, and they be rendered incapable of giving right counsel:

and understanding out of the mount of Esau ?
that is, men of understanding, as the Targum, should be destroyed out of Edom or Idumea, which was a mountainous country; such as were well versed in politics, or understood military affairs, and how to conduct at such a critical time; to form schemes, and concert measures, and wisely put them in execution; and to be deprived of all such must be a great loss at such a time, and add to their distress and calamity; see (Jeremiah 49:7) .