Charles Ellicott Commentary Deuteronomy 2:8

"So we passed by from our brethren the children of Esau, that dwell in Seir, from the way of the Arabah from Elath and from Ezion-geber. And we turned and passed by the way of the wilderness of Moab." — Deuteronomy 2:8 (ASV)

When we passed ... from ... Esau ... through the way of the plain from Elath. —The route from Seir, after Esau’s refusal, was southward to Ezion-geber, at the head of the Gulf of Akabah, and Elath, a few miles south-east of Ezion-geber, on the same coast. They then turned northward, and going round the territory of Edom, reached the country of Moab.