Ar in the Bible

Numbers 21:15 And at the stream of the brooks that goeth down to the dwelling of Ar, and lieth upon the border of Moab.
Deuteronomy 2:9 And the LORD said unto me, Distress not the Moabites, neither contend with them in battle: for I will not give thee of their land for a possession; because I have given Ar unto the children of Lot for a possession.
Deuteronomy 2:18 Thou art to pass over through Ar, the coast of Moab, this day:
Deuteronomy 2:24 Rise ye up, take your journey, and pass over the river Arnon: behold, I have given into thine hand Sihon the Amorite, king of Heshbon, and his land: begin to possess it, and contend with him in battle.
Deuteronomy 2:29 (As the children of Esau which dwell in Seir, and the Moabites which dwell in Ar, did unto me;) until I shall pass over Jordan into the land which the LORD our God giveth us.

Numbers 21:26-30 For Heshbon was the city of Sihon the king of the Amorites, who had fought against the former king of Moab, and taken all his land out of his hand, even unto Arnon. 27 Wherefore they that speak in proverbs say, Come into Heshbon, let the city of Sihon be built and prepared: 28 For there is a fire gone out of Heshbon, a flame from the city of Sihon: it hath consumed Ar of Moab, and the lords of the high places of Arnon. 29 Woe to thee, Moab! thou art undone, O people of Chemosh: he hath given his sons that escaped, and his daughters, into captivity unto Sihon king of the Amorites. ...
Isaiah 15:1 The burden of Moab. Because in the night Ar of Moab is laid waste, and brought to silence; because in the night Kir of Moab is laid waste, and brought to silence;