Evidently this precept was intended to teach the people of GOD then, and through them the people of GOD in all ages, not to love the world neither the things of the world. They who are set out for Canaan, are to have no objects to allure or lead them out of the way. Sweet is that account of the Patriarchs, Hebrews 11:13-16.
Related Commentaries of Deuteronomy 2:9
Deuteronomy 2:9
9 And the LORD said unto me, Distressb not the Moabites, neither contend with them in battle: for I will not give thee of their land for a possession; because I have given Ar unto the children of Lot for a possession.