20 Till the Lord has given rest to your brothers as to you, and till they have taken for themselves the land which the Lord your God is giving them on the other side of Jordan: then you may go back, every man of you, to the heritage which I have given you.
Matthew Henry's Commentary on Deuteronomy 3:20
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.