Numbers 21:15

15 even the slopes of the wadis that extend to the site of Ar and lie along the border of Moab.”

Numbers 21:15 Meaning and Commentary

Numbers 21:15

And at the stream of the brooks that goeth down to the
dwelling of Ar
All that part of the country which lay upon the stream, as far as the city of Ar, the metropolis of Moab, called Ar of Moab, ( Isaiah 15:1 ) ,

and lieth upon the border of Moab;
as that city did; so far goes the quotation out of the aforesaid book, as a proof of what was taken by the Amorites from the Moabites, and were not in their possession when Israel were upon their borders; and therefore, in taking them from the Amorites, did no wrong to Moab.

Numbers 21:15 In-Context

13 From there they moved on and camped on the other side of the Arnon, in the wilderness that extends into the Amorite territory. Now the Arnon is the border between the Moabites and the Amorites.

14 Therefore it is stated in the Book of the Wars of the LORD: “Waheb in Suphah and the wadis of the Arnon,

15 even the slopes of the wadis that extend to the site of Ar and lie along the border of Moab.”

16 From there they went on to Beer, the well where the LORD said to Moses, “Gather the people so that I may give them water.”

17 Then Israel sang this song: “Spring up, O well, all of you sing to it!