two tribes: These two tribes inherited the dominions of Sihon and Og, the two vanquished kings of the Amorites, which extended from the Arnon to Mount Hermon. Of those counties, Moses gave to the tribe of Reuben the south-west part, which was bounded on the south by the river Arnon, on the west by Jordan, and on the north and east by the tribe of Gad. The tribe of Gad was bounded by the river Jordan and tribe of Reuben on the west, by the half tribe of Manasseh on the north, by the kingdom of the Amorites and Arabia Deserta on the East, and by the tribe of Reuben on the south. The part belonging to the tribe of Manasseh was bounded by the tribe of Gad on the south, by the sea of Galilee and part of Jordan on the west, by Hermon and Lebanon on the north, and by the mountains of Trachonitis on the east.
on this side Jordan: Numbers 32:32