Deuteronomy 2:9

And the Lord said unto me ,.... When upon the borders of Moab:

distress not the Moabites, neither contend with than in battle ; besiege not any of their cities, nor draw them into a battle, or provoke them to fight:

for I will not give thee of their land for a possession ; at least not as yet, the measure of their sins not being fully up, and the time of their punishment not come; otherwise in David's time they were subdued, and became tributaries to him, and the Edomites also, 2 Samuel 8:2 ,

because I have given Ar unto the children of Lot for a possession ; so the Moabites were, they sprung from Moab, a son of Lot by his firstborn daughter, Genesis 19:37 . Ar was the metropolis of Moab, called Ar of Moab, Isaiah 15:1 and is here put for the whole country of Moab; so Aben Ezra interprets it of Moab. Jarchi says it is the name of the province; in the Septuagint version it called Aroer.