Therefore it is said in the Book of the Wars of the LORD: "Waheb in Suphah, The brooks of the Arnon,
Numbers 21:14
Surrounding context
21:13 From there they moved and camped on the other side of the Arnon, which is in the wilderness that extends from the border of the Amorites; for the Arnon is the border of Moab, between Moab and the Amorites.
21:14 Therefore it is said in the Book of the Wars of the LORD: "Waheb in Suphah, The brooks of the Arnon,
21:15 And the slope of the brooks That reaches to the dwelling of Ar, And lies on the border of Moab."