Deuteronomy 2:5

2:5 Do not be hostile toward them, because I am not giving you any of their land, not even a footprint, for I have given Mount Seir as an inheritance for Esau.

Numbers 21:15

21:15 and the slope of the valleys

that extends to the dwelling of Ar,

and falls off at the border of Moab.”

Numbers 21:28

21:28 For fire went out from Heshbon,

a flame from the city of Sihon.

It has consumed Ar of Moab

and the lords of the high places of Arnon.