Deuteronomy 3:10

All the cities of the plain
There was a plain by Medeba, and Heshbon and her cities were in a plain, with some others given to the tribe of Reuben, ( Joshua 13:16 Joshua 13:17 )

and all Gilead;
Mount Gilead, and the cities belonging to it, a very fruitful country, half of which fell to the share of the Reubenites, and the rest to the half tribe of Manasseh:

and all Bashan;
of which Og was king, called Batanea, a very fertile country, as before observed:

unto Salcah and Edrei, cities of the kingdom of Og in Bashan;
which seem to be frontier cities of the latter: see ( Deuteronomy 1:4 ) ( 3:1 ) . The former, Adrichomius ^F16 says, was situated by the city Geshur and Mount Hermon, and was the boundary of the country of Bashan to the north; and according to Benjamin of Tudela ^F17, it was half a day's journey from Gilead: as Edrei seems to be its boundary to the south.