18 I commanded you at that time, saying, “Yahweh your God has given you this land to possess it: you shall pass over armed before your brothers the children of Israel, all the men of valor.

Matthew Henry's Commentary on Deuteronomy 3:18

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.