Edom and Teman in this verse signify both the same thing; God calls to men to hear the resolutions he had taken up against the Edomites, resolutions as wise and steady as if they had been taken upon the wisest counsels and deliberation. Surely the least of the flock shall draw them out; God is resolved to drive out the Edomites, and the least of Nebuchadnezzar's forces shall drag them out of their lurking-places; and God will make the place where they dwell a desolation.
Related Commentaries of Jeremiah 49:20
Jeremiah 49:20
20 Therefore hear the counsel of the LORD, that he hath taken against Edom; and his purposes, that he hath purposed against the inhabitants of Teman: Surely the least of the flock shall draw them out: surely he shall make their habitations desolate with them.