If you haven't seen it already, I would recommend "The Chosen"! The first episode of Season 2 can be viewed by clicking here!
Smith's Bible Dictionary
Idume'a. (red). See Edom.
Map of Location
These files are public domain.
Smith, William, Dr. Entry for 'Idumea'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/i/idumea.html. 1901.