Numbers 21:12-16

121From there they set out and camped in 2Wadi Zered. 13From there they journeyed and camped on the other side of the Arnon, which is in the wilderness that comes out of the border of the Amorites; 3for the Arnon is the border of Moab, between Moab and the Amorites. 14For that reason it is said in the Book of the Wars of the Lord, “Waheb in Suphah, And the 4wadis of the Arnon,15And the slope of the wadis That extends to the site of 5Ar, And leans to the border of Moab.”

166From there they continued to 7Beer, that is the well where the Lord said to Moses, “Assemble the people, that I may give them water.”