John Gill Commentary Deuteronomy 2:3

"Ye have compassed this mountain long enough: turn you northward." — Deuteronomy 2:3 (ASV)

You have compassed this mountain long enough
It was time to be gone from there, as from Horeb, (Deuteronomy 1:6) ,

turn you northward ;
from the southern border of Edom towards the land of Canaan, which lay north. It was from Eziongeber in the land of Edom, from where the Israelites came to Kadesh, where they sent messengers to the king of Edom, to desire a passage through his land; see (Numbers 33:36) (20:14) .