Deuteronomy 1:2-4

2Now it is ordinarily an eleven-day journey from Horeb to Kadesh Barnea by way of Mount Seir.

3However, it was not until the first day of the eleventh month of the fortieth year that Moses addressed the Israelites just as the Lord had instructed him to do.

4This took place after the defeat of King Sihon of the Amorites, whose capital was in Heshbon, and King Og of Bashan, whose capital was in Ashtaroth, specifically in Edrei.