We have an historical account of Israel's journeys around Mount Seir. Items of interest here, the descendants of Esau and of Lot are to be unmolested, they are to be paid for goods needed to travel through their lands. We know very little of how God dealt with them but we do see how He honored the covenant with Abraham through these which were his descendants and relatives. But Sihon the king of Heshbon was an enemy of God's people, he fought against Moab (descendants of Lot) and took their land. Now he intends to fight against Israel but God will give Israel that land.