Deuteronomy 2:24

21 They were a great people, tall as the Anakim, and equal to them in number; but the Lord sent destruction on them and the children of Ammon took their place, living in their land;

22 As he did for the children of Esau living in Seir, when he sent destruction on the Horites before them, and they took their land where they are living to this day:

23 And the Avvim, living in the small towns as far as Gaza, came to destruction by the hands of the Caphtorim who came out from Caphtor and took their land.)

24 Get up now, and go on your journey, crossing over the valley of the Arnon: see, I have given into your hands Sihon, the Amorite, king of Heshbon, and all his land: go forward to make it yours, and make war on him,

25 From now on I will put the fear of you in all peoples under heaven, who, hearing of you, will be shaking with fear and grief of heart because of you.

26 Then from the waste land of Kedemoth I sent representatives to Sihon, king of Heshbon, with words of peace, saying,

27 Let me go through your land: I will keep to the highway, not turning to the right or to the left;