Deuteronomy 2:23

19When you come near the border of the children of Ammon, don’t bother them, nor contend with them; for I will not give you any of the land of the children of Ammon for a possession, because I have given it to the children of Lot for a possession.”

20(That also is considered a land of Rephaim. Rephaim lived there in the past, but the Ammonites call them Zamzummim,

21a great people, many, and tall, as the Anakim; but the LORD destroyed them from before Israel, and they succeeded them, and lived in their place,

22as he did for the children of Esau who dwell in Seir, when he destroyed the Horites from before them; and they succeeded them, and lived in their place even to this day.

23Then the Avvim, who lived in villages as far as Gaza: the Caphtorim, who came out of Caphtor, destroyed them and lived in their place.)

24“Rise up, take your journey, and pass over the valley of the Arnon. Behold, I have given into your hand Sihon the Amorite, king of Heshbon, and his land; begin to possess it, and contend with him in battle.

25Today I will begin to put the dread of you and the fear of you on the peoples who are under the whole sky, who shall hear the report of you, and shall tremble and be in anguish because of you.”

26I sent messengers out of the wilderness of Kedemoth to Sihon king of Heshbon with words of peace, saying,

27“Let me pass through your land. I will go along by the highway. I will turn neither to the right hand nor to the left.