28 So Moses gave orders to Eleazar the priest, Joshua son of Nun, and the leaders of the clans of Israel. 29 He said, "The men of Gad and Reuben who are armed for battle must cross the Jordan with you to fight for the Lord . If they do, give them the land of Gilead as their property when the land is conquered. 30 But if they refuse to arm themselves and cross over with you, then they must accept land with the rest of you in the land of Canaan." 31 The tribes of Gad and Reuben said again, "We are your servants, and we will do as the Lord has commanded! 32 We will cross the Jordan into Canaan fully armed to fight for the Lord, but our property will be here on this side of the Jordan."
Matthew Henry's Commentary on Numbers 32:28-32
Commentary on Numbers 32:28-42
(Read Numbers 32:28-42)
Concerning the settlement of these tribes, observe, that they built the cities, that is, repaired them. They changed the names of them; probably they were idolatrous, therefore they should be forgotten. A spirit of selfishness, of seeking our own, not the things of Christ, when each one ought to assist others, is as dangerous as it is common. It is impossible to be sincere in the faith, sensible of the goodness of God, constrained by the love of Christ, sanctified by the power of the Holy Ghost, and yet be indifferent to the progress of religion, and the spiritual success of others, through love of ease, or fear of conflict. Let then your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.