The Israelites set out and camped at Oboth.
References for Numbers 21:10
They set out from Oboth and camped at Iye-abarim in the wilderness that borders Moab on the east.
From there they went and camped at Zered Valley.
They set out from there and camped on the other side of the Arnon [River], in the wilderness that extends from the Amorite border, because the Arnon was the Moabite border between Moab and the Amorites.
Therefore it is stated in the Book of the Lord's Wars: Waheb in Suphah and the ravines of the Arnon,
References for Numbers 21:14
even the slopes of the ravines that extend to the site of Ar and lie along the border of Moab.
References for Numbers 21:15
From there [they went] to Beer, the well the Lord told Moses about, "Gather the people so I may give them water."
References for Numbers 21:16
Then Israel sang this song: Spring up, well-sing to it!
The princes dug the well; The nobles of the people hollowed it out with a scepter and with their staffs. [They went] from the wilderness to Mattanah,
from Mattanah to Nahaliel, from Nahaliel to Bamoth,
from Bamoth to the valley in the territory of Moab near the Pisgah highlands that overlook the wasteland.
References for Numbers 21:20