DeuteronomyChapter 2

Then we turned back and set out for the wilderness by the way to the Red Sea, as the LORD had told me, and for many days we circled Mount Seir.
And command the people: You are about to pass through the territory of your kinsmen, the descendants of Esau, who live in Seir. They will be afraid of you, so be very careful.
Do not provoke them, for I will not give you any of their land, not so much as a footstep, because I have given Mount Seir to Esau as his possession.
You shall buy food from them with silver, so that you may eat, and you shall also buy water from them with silver, so that you may drink.
For the LORD your God has blessed you in all the work of your hands. He has watched over your journey through this vast wilderness. These forty years the LORD your God has been with you, and you have lacked nothing."
So we passed by our kinsmen, the descendants of Esau, who live in Seir, leaving the road through the Arabah from Elath and Ezion-geber. Then we turned and went along the road toward the wilderness of Moab.
And the LORD said to me, "Do not harass Moab or engage them in battle, for I will not give you any of his land as a possession, since I have given Ar to the descendants of Lot as their possession."
The Horites used to live in Seir, but the descendants of Esau dispossessed them, wiped them out, and settled in their place, just as Israel did in the land the LORD gave them as their possession.)
"Now get up and cross the Zered Valley." So we crossed the Zered Valley.
Thirty-eight years passed from the time we left Kadesh-barnea until we crossed the Zered Valley, until the whole generation of fighting men had perished from the camp, as the LORD had sworn to them.
Indeed, the hand of the LORD was against them, to root them out from the camp until they had all perished.
When you approach the territory of the Ammonites, do not harass them or provoke them, for I will not give you any of the land of the Ammonites as a possession, since I have given it to the descendants of Lot as their possession."
(That land too was reckoned as a land of Rephaim. Rephaim used to live there, though the Ammonites called them Zamzummim—
just as he had done for the descendants of Esau, who live in Seir, when he destroyed the Horites before them, so that they dispossessed them and have lived in their place to this day.
And the Avvim, who lived in villages as far as Gaza, were destroyed by the Caphtorim, who came from Caphtor and settled in their place.)
"Rise up, set out, and cross the Arnon Valley. See, I have given Sihon the Amorite, king of Heshbon, and his land into your hand. Begin to take possession of it, and engage him in battle.
This very day I will begin to put the dread and fear of you upon all the peoples under heaven. When they hear the report of you, they will tremble and writhe in anguish because of you."
From the wilderness of Kedemoth I sent messengers to Sihon king of Heshbon with words of peace, saying,
"Let me pass through your land. I will keep strictly to the road and turn aside neither to the right nor to the left.
Sell me food for silver so that I may eat, and give me water for silver so that I may drink. Only let me pass through on foot,
as the descendants of Esau who live in Seir and the Moabites who live in Ar did for me, until I cross the Jordan into the land the LORD our God is giving us."
But Sihon king of Heshbon would not let us pass through, for the LORD your God had hardened his spirit and made his heart obstinate, in order to give him into your hand, as he has now done.
Then Sihon came out against us with all his people to do battle at Jahaz.
And the LORD our God gave him over to us, and we struck him down along with his sons and all his people.
At that time we captured all his cities and devoted every city to destruction—men, women, and children. We left no survivor.
From Aroer on the rim of the Arnon Valley, and from the city in the valley, as far as Gilead, there was no town too strong for us. The LORD our God gave them all over to us.
But you did not go near the land of the Ammonites, nor any part along the Jabbok River, nor the towns of the hill country — nothing that the LORD our God had forbidden us.