A city on the torrent Arnon, the southern point of the territory of Sihon king of the Amorites and afterwards of the tribe of Reuben (Deuteronomy 2:36; 3:12; 4:48; Joshua 12:2; 13:9, 16; Judges 11:26; 2 Kings 10:33; 1 Chronicles 5:8) but later again in possession of Moab (Jeremiah 48:19). It is the modern Ara’ir, upon the very edge of the precipitous north bank of the Wady Mojeb.
Aroer, “that is ‘facing’ Rahbah” (Rabbah of Ammon), a town built by and belonging to Gad (Numbers 32:34; Joshua 13:25; 2 Samuel 24:5). This is probably the place mentioned in Judges 11:33 that was shown in Jerome’s time.
Aroer, in Isaiah 17:2 if a place at all, must be still farther north than either of the two already named.
A town in Judah, named only in 1 Samuel 30:28, perhaps Wady Ar’arah, on the road from Petra to Gaza.
Smith's Bible Names Dictionary (1866)
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