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, ( Numbers 32:35 ) .