Rivers: Arnon
Source: TTT
Deuteronomy 2:36
From Aroer on the rim of the Arnon Valley, along with the city in the valley, even as far as Gilead, not one city had walls too high for us. The LORD our God gave us all of them.
Joshua 12:1
Now these are the kings of the land whom the Israelites struck down and whose lands they took beyond the Jordan to the east, from the Arnon Valley to Mount Hermon, including all the Arabah eastward: