16 To the Reubenites and to the Gadites I gave from Gilead even to the valley of the Arnon, the middle of the valley, and the border of it, even to the river Jabbok, which is the border of the children of Ammon;

Matthew Henry's Commentary on Deuteronomy 3:16

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.