Numbers 21:28 continues the Song of Heshbon, referring to Ar and Arnon—the same places from v15's poetic fragment.

Deuteronomy 2:9 explains that Ar was given to Moab, adding historical background to the border reference in v15.

Deuteronomy 2:29 mentions the Moabites dwelling in Ar, the same location referenced here as the border of Moab.

Isaiah 15:1 pronounces judgment on Ar of Moab, the same city mentioned here as the dwelling of Ar.