From Aroer, which is by the brink of the river Arnon.... Upon the border of Moab, and the principal city of it; see Jer 48:19. and from the city that is by the river; or even the city that is in the midst of the river, the city Aroer, which seems to be meant; see Jos 12:2. This river is afterwards called the river of Gad, Sa2 24:5 in the midst of it Aroer was, perhaps because it was possessed by the tribe of Gad: even unto Gilead; Mount Gilead and the country adjacent to it, which belonged to Og king of Bashan: there was not one city too strong for us; that could hold out against them, when attacked and besieged by them, but presently surrendered: the Lord our God delivered all unto us; Moses ascribes all the victories and success they had unto the Lord, not to their own might and power, but to the power of God with them, and his blessing on them.