Cross reference
Deuteronomy 2:18
18 Thou art this day to pass over Ar, the border of Moab:
Numbers 21:15
15 And the slope of the valleys That inclineth toward the dwelling of Ar, And leaneth upon the border of Moab.
Numbers 21:23
23 And Sihon would not suffer 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 nought; for in a night Kir of Moab is laid waste, `and' brought to nought.