Mistaken priorities[1]
וגשו אליו ויאמרו גדרת צאן נבנה למקננו פה וערים לטפנו וגו’ בנו-לכם ערים לטפכם וגדרת לצאנכם וגו’
[The tribes of Reuven and Gad] approached [Moshe] and said: “We will build shelters here for our flock and cities for our children”…[Moshe responded: “Build for yourselves cities for your children, and shelters for your flock”…[2]
After the Jews conquered the land of Sichon and Og, on the east side of the Jordan River, they were prepared to enter the Promised Land. The tribes of Reuven and Gad noticed that the area they had just conquered was excellent grazing land. Being that they had ample flock to feed, they thought it would be a good idea for their apportioned land to be given from this one, instead of the land of Israel proper. They approached Moshe and told him if they received this conquered land, they would use it to build shelters for their flock, and cities for their children.