28 So Moses gave orders about them to Eleazar the priest and to Joshua, the son of Nun, and to the heads of families of the tribes of the children of Israel. 29 And Moses said to them, If the children of Gad and the children of Reuben go with you over Jordan, every man armed for the fight before the Lord, and all the land is given into your hands, then let them have the land of Gilead for a heritage: 30 But if they do not go over with you armed, they will have to take their heritage with you in the land of Canaan. 31 Then the children of Gad and the children of Reuben said, As the Lord has said to your servants, so will we do. 32 We will go over armed before the Lord into the land of Canaan, and you will give us our heritage on this side of 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.