Cross reference
Deuteronomy 2:18
18 You are this day to pass over Ar, the border of Moab:
Numbers 21:15
15 The slope of the valleys That inclines toward the dwelling of Ar, Leans on the border of Moab.
Numbers 21:23
23 Sihon would not allow Israel to pass through his border: but Sihon gathered all his people together, and went out against Israel into the wilderness, and came to Jahaz; and he fought against Israel.
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.