the Book of the Wars of the LORD: This is similar to The Book of Jashar (Joshua 10:13; 2 Samuel 1:18). The Book of the Wars of the Lord is not known from any other source.
Waheb, a town, and Suphah, a region, are not known from any other record. Their exact locations are unknown.
Ar was one of the main settlements of Moab at that time (compare 21:28; Deuteronomy 2:18; Isaiah 15:1).