And Moses said unto them,.... To Eleazar, Joshua, and the princes of the congregation:

if the children of Gad and the children of Reuben will pass with you over Jordan, every man armed to battle before the Lord; as they have promised they will:

and the land shall be subdued before you; which must be done before their return:

then ye shall give them the land of Gilead for a possession; which, no doubt, included that of Jazer too, since Jaazer, which is the same, is after mentioned as one of the cities built by the children of Gad, Num 32:35.

And the children of Gad and the children of Reuben spake unto Moses, saying,.... In answer to his speech:

thy servants will do as my lord commandeth; both with respect to their march before the Lord to battle, and with respect to their provision for their children and flocks.

Next: Numbers Chapter 33

concerning them Moses commanded--The arrangement itself, as well as the express terms on which he assented to it, was announced by the leader to the public authorities. The pastoral country the two tribes had desired was to be granted them on condition that they would lend their aid to their brethren in the approaching invasion of Canaan. If they refused or failed to perform their promise, those possessions should be forfeited, and they themselves compelled to go across the Jordan and fight for a settlement like the rest of their brethren.