From there they went and camped across the Arnon, in the desert just inside the Amorite country. The Arnon is the border between the Moabites and the Amorites.
The Lord said, “Get up and cross the Arnon Ravine. See, I am giving you the power to defeat Sihon the Amorite, king of Heshbon, and I am giving you his land. So fight against him and begin taking his land.
“Then the Israelites went into the desert around the borders of the lands of Edom and Moab. Israel went east of the land of Moab and camped on the other side of the Arnon River, the border of Moab. They did not cross it to go into the land of Moab.