Cross reference
Numbers 21:15
15 The slope of the valleys That inclines toward the dwelling of Ar, Leans on the border of Moab.
Numbers 21:28
28 For a fire is gone out of Heshbon, A flame from the city of Sihon: It has devoured Ar of Moab, The lords of the high places of the Arnon.
Deuteronomy 2:9
9 Yahweh said to me, Don't bother Moab, neither contend with them in battle; for I will not give you of his land for a possession; because I have given Ar to the children of Lot for a possession.
Deuteronomy 2:18
18 You are this day to pass over Ar, the border of Moab:
Deuteronomy 2:29
29 as the children of Esau who dwell in Seir, and the Moabites who dwell in Ar, did to me; until I shall pass over the Jordan into the land which Yahweh our God gives us.
Isaiah 15:1
1 The burden of Moab. For in a night Ar of Moab is laid waste, [and] brought to nothing; for in a night Kir of Moab is laid waste, [and] brought to nothing.