“Today you are going to cross the border of Moab at Ar.
It is observable here that Moses, speaking of the Edomites (Deu 2:8), calls them, "our brethren, the children of Esau." Though they had been unkind to Israel, in refusing them a peaceable passage through their country, yet he calls them brethren.
Commenting on Deuteronomy 2:8-23
Thou art to pass over through Ar,.... That is, over the river Arnon, by the city Ar of Moab, which was situated by it; see Deu 2:9 and so Moses and the people of Israel were to pass along by that: and by the coast of Moab; for they were not admitted to enter the land and pass through it; only to travel on the...
Deu 2:16-22 When this generation had quite died out, the Lord made known to Moses, and through him to the people, that they were to cross over the boundary of Moab (i.e., the Arnon, Deu 2:24; see at Num 21:13), the land of Ar (see at Deu 2:9), “to come nigh over against the children of Ammon,” i.e., to advance into the neighbourhood of the...
Commenting on Deuteronomy 2:16-22