Numbers 21:25

21 Then Israel sent messengers to Sihon king of the Amorites, saying,

22 “Let us pass through your land. We will not cut through any field or vineyard, or drink water from any well. We will stay on the King’s Highway until we have passed through your territory.”

23 But Sihon would not let Israel pass through his territory. Instead, he gathered his whole army and went out to confront Israel in the wilderness. When he came to Jahaz, he fought against Israel.

24 And Israel put him to the sword and took possession of his land, from the Arnon to the Jabbok—but only up to the border of the Ammonites, because it was fortified.

25 Israel captured all the cities of the Amorites and occupied them, including Heshbon and all its villages.

26 Heshbon was the city of Sihon king of the Amorites, who had fought against the former king of Moab and taken all his land as far as the Arnon.

27 That is why the poets say: “Come to Heshbon, let it be rebuilt; let the city of Sihon be restored.

28 For a fire went out from Heshbon, a blaze from the city of Sihon. It consumed Ar of Moab, the rulers of Arnon’s heights.

29 Woe to you, O Moab! You are destroyed, O people of Chemosh! He gave up his sons as refugees, and his daughters into captivity to Sihon king of the Amorites.

Read all of Numbers 21