Fausset's Bible Dictionary
The stage in Israel's wilderness journey next after Mount Hor (Numbers 33:41) on the march from Kadesh round Edom. From zelem , "image"; where the brazen serpent was set up. Same as Ma'an or Alam Na'an (Von Raumer), E. of Petra, one of the largest villages on the Meeca route, abounding in water and vineyards; where Israel, as pilgrims in our days, might traffic for provisions. Others place Zalmonah in the wady Ithm, which runs into the Arabah near Elath.
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Fausset, Andrew R. Entry for 'Zalmonah'. Fausset's Bible Dictionary. https://www.studylight.org/dictionaries/eng/fbd/z/zalmonah.html. 1949.