Biblical land near the kingdoms of Judah and Moab (4)

I believe the answer is:

edom

(Other definitions for edom that I've seen before include "In the Bible, the land of the people of Esau" , "Biblical land" , "Backward manner of existence" , "Kingdom of the Middle East" , "Ancient land bordering Israel" .)

I've seen this clue in The New York Times.

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