Pisgah and Peor faced the Jeshimon, i.e. the waste; not merely midbar , "a common" rather than a desert (Numbers 21:20; Numbers 23:28). The desolate tract skirting the N. and N.W. coasts of the Dead Sea, between the Jordan mouth (near which was Beth-jeshimoth) and Engedi: consisting of chalky crumbling limestone rocks and a fiat covered with nitrous crust, into which the feet sink as in ashes; without vegetation except the hubeibeh, or alkali plant. The hill of HACHILAH was "S. of" or "before" Jeshimon (1 Samuel 23:19; 1 Samuel 26:1; 1 Samuel 26:3.) Eusebius says Jeshimon was ten miles S.of Jericho, near the Dead Sea. "The mid bar ("pastoral common") of Judah" stretched S. of Jeshimon from Engedi southward (Joshua 15:61-62).

Bibliography Information
Fausset, Andrew R. Entry for 'Jeshimon'. Fausset's Bible Dictionary. https://www.studylight.org/dictionaries/eng/fbd/j/jeshimon.html. 1949.

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Fausset's Bible Dictionary

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Jeshimon