But if they do not arm themselves and go across with you, then they must accept their possession among you in the land of Canaan.”
But if they will not pass over with you armed,.... Shall change their minds, and break their promise, and refuse to go over the river Jordan with the other tribes, and armed ready to engage in battle with the enemy: they shall have possessions among you in the land of Canaan; take their lot there, but have no inheritance or possessions on this side Jordan.
Num 32:28-30 Moses thereupon commanded Eleazar, Joshua, and the heads of the tribes of Israel, i.e., the persons entrusted in Num 34:17. with the division of the land of Canaan, to give the Gadites and Reubenites the land of Gilead for a possession, after the conquest of Canaan, if they should go along with them across the Jordan equipped for battle.
Commenting on Numbers 32:28-30