And their coast was Jazer,.... Their southern coast; of Jazer, see Num 21:32; where it is called Jaazer, and is mentioned in Isa 16:8; and in Jer 48:32, where it is spoken of as a city of Moab, as it was in the days of those prophets: and all the cities of Gilead; which lay in those parts, for the whole was not given to this tribe, half of Gilead was given to the half tribe of Manasseh, Jos 13:31, and half the land of the children of Ammon; not what then belonged to them, but what had been taken from them by the Amorites; and which Israel taking from them, had a right to retain, though they were forbid meddling with any of their land in present possession; see Deu 2:19 Jdg 11:13, unto Aroer that is before Rabbath; Aroer was a city of Moab, situated on the river Arnon, Jos 13:9; and stood over against Rabbath, a city of the Amorites, since called Philadelphia, the same that Joab took, Sa2 12:26; though Reland thinks (n), that according to the situation of these cities another Aroer must be here meant, and which belonged to the Amorites. (n) Palestin. Illustrat. tom. 2. p. 583.