Deuteronomy 2:9

2:9 Then the Lord said to me, “Do not harass Moab and provoke them to war, for I will not give you any of their land as your territory. This is because I have given Ar to the descendants of Lot as their possession.

Deuteronomy 2:18

2:18 “Today you are going to cross the border of Moab, that is, of Ar.