Numbers 21:9-13
English Standard Version
10And the people of Israel set out and camped in Oboth.
11And they set out from Oboth and camped at Iye-abarim, in the wilderness that is opposite Moab, toward the sunrise.
12From there they set out and camped in the Valley of Zered.
13From there they set out 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.