Deuteronomy 2:22-26

just as He did for the sons of Esau, who live in Seir, when He destroyed the Horites from before them; they dispossessed them and settled in their place, where they remain even to this day.

And as for the Avvim, who lived in villages as far as Gaza, the Caphtorim, who came from Caphtor, destroyed them and lived in their place.)

‘Arise, set out, and pass through the Valley of Arnon. Look! I have handed over to you Sihon the Amorite, king of Heshbon, and his land; start taking possession and plunge into battle with him.

This day I will begin to put the dread and fear of you upon the faces of people everywhere, who, when they hear the news of you, will tremble and be in anguish because of you.’

“So I sent messengers from the wilderness of Kedemoth to Sihon king of Heshbon with words of peace, saying,