8 So we took the land at that time out of the hand of the two kings of the Amorites who were beyond the Jordan, from the valley of the Arnon to Mount Hermon 9 (the Sido'nians call Hermon Si'rion, while the Amorites call it Senir), 10 all the cities of the tableland and all Gilead and all Bashan, as far as Sal'ecah and Ed're-i, cities of the kingdom of Og in Bashan. 11 (For only Og the king of Bashan was left of the remnant of the Reph'aim; behold, his bedstead was a bedstead of iron; is it not in Rabbah of the Ammonites? Nine cubits was its length, and four cubits its breadth, according to the common cubit.)

Reuben, Gad, and Half of Manasseh Settle East of the Jordan

12 "When we took possession of this land at that time, I gave to the Reubenites and the Gadites the territory beginning at Aro'er, which is on the edge of the valley of the Arnon, and half the hill country of Gilead with its cities; 13 the rest of Gilead, and all Bashan, the kingdom of Og, that is, all the region of Argob, I gave to the half-tribe of Manas'seh. (The whole of that Bashan is called the land of Reph'aim. 14 Ja'ir the Manas'site took all the region of Argob, that is, Bashan, as far as the border of the Gesh'urites and the Ma-ac'athites, and called the villages after his own name, Hav'voth-ja'ir, as it is to this day.) 15 To Machir I gave Gilead, 16 and to the Reubenites and the Gadites I gave the territory from Gilead as far as the valley of the Arnon, with the middle of the valley as a boundary, as far over as the river Jabbok, the boundary of the Ammonites; 17 the Arabah also, with the Jordan as the boundary, from Chin'nereth as far as the sea of the Arabah, the Salt Sea, under the slopes of Pisgah on the east.

Matthew Henry's Commentary on Deuteronomy 3:8-17

Commentary on Deuteronomy 3:1-11

(Read Deuteronomy 3:1-11)

1-11 Og was very powerful, but he did not take warning by the ruin of Sihon, and desire conditions of peace. He trusted his own strength, and so was hardened to his destruction. Those not awakened by the judgments of God on others, ripen for the like judgments on themselves.

Commentary on Deuteronomy 3:12-20

(Read Deuteronomy 3:12-20)

This country was settled on the Reubenites, Gadites, and half the tribe of Manasseh: see Numbers 32. Moses repeats the condition of the grant to which they agreed. When at rest, we should desire to see our brethren at rest too, and should be ready to do what we can towards it; for we are not born for ourselves, but are members one of another.