Deuteronomy 2:16-20

16“When all the fighting men had died among the people,

17the Lord spoke to me,

18‘Today you are going to cross the border of Moab at Ar.

19When you get close to the Ammonites, don’t show any hostility to them or provoke them, for I will not give you any of the Ammonites’ land as a possession; I have given it as a possession to the descendants of Lot.’”

20This too used to be regarded as the land of the Rephaim. The Rephaim lived there previously, though the Ammonites called them Zamzummim,