Joshua 13:9

“From Aroer, that [is] on the bank of the river Arnon, etc.] A city belonging to Moab, from whence the description begins, the river Arnon, on which it was situated, being the border between Moab and the Amorites, (<042113>Numbers 21:13); and the city that [is] in the midst of the river; or “even the city”; meaning the same city of Aroer, it lying both on the bank of it, and in the middle of it, or it was a double city, as may seem from (<231702>Isaiah 17:2); and so differently situated at that river: and all the plains of Medeba unto Dibon; of these two places, (see <042130> Numbers 21:30); between them lay a plain, which some take to be the plain of Moab; but it rather seems to be a plain…”

“The writer appends to the command of God Joshua 13:1-7 a statement that the other two tribes and a half had already had their inheritance marked out for them by Moses in the land east of Jordan. The boundaries of this territory as a whole are first set forth Joshua 13:8-14, and afterward the portions assigned within it to the two tribes and a half are severally described Joshua 13:15-33. Joshua 13:14 See Deuteronomy 18:1-5 and notes. Joshua 13:15-24 Inheritance of the tribe of Reuben. This territory was the most southerly of the trans-Jordanic possessions of Israel, and adjoined Moab, which lay only on the other side of the Arnon. Hence, the Reubenites became in after times much intermixed…”

“Medeba unto Dibon - Two cities anciently belonging to the Moabites, and taken from them by the Amorites, Num 21:30, and from them by the Israelites; and after the Israelites were gone into captivity, recovered by the first possessors, the Moabites. Joshua 13:11”

“Aroer: Jos 13:16, Jos 12:2; Deu 3:12, Deu 3:16 all the plain: Num 21:30; Isa 15:2; Jer 48:18, Jer 48:22 Joshua 13:10”