Their territory extended from Mesha to Sephar, in the eastern hill country.
Two things especially are observable in this account of the posterity of Shem: - I. The description of Shem, Gen 10:21. We have not only his name, Shem, which signifies a name, but two titles to distinguish him by: - 1. He was the father of all the children of Eber.
Commenting on Genesis 10:21-32
And their dwelling was from Mesha, as thou goest unto Zephar, a mount of the east. Mesha, which is thought to be the Muza of Ptolemy and Pliny, was a famous port in the Red sea, frequented by the merchants of Egypt and Ethiopia, from which the Sappharites lay directly eastward; to whose country they used to go for myrrh and frankincense, and the like...
Gen 10:30-31 The settlements of these Joktanides lay “from Mesha towards Sephar the mountain of the East,” Mesha is still unknown: according to Gesenius, it is Mesene on the Persian Gulf, and in Knobel's opinion, it is the valley of Bisha or Beishe in the north of Yemen; but both are very improbable.
Commenting on Genesis 10:30-31