Their border was Jazer, and all the cities of Gilead, and half the land of the children of Ammon, to Aroer that is before Rabbah;
unto Aroer that [is] before Rabbath; Aroer was a city of Moab, situated on the river Arnon, Joshua 13:9; and stood over against Rabbath, a city of the Amorites, since called Philadelphia, the same that Joab took,