Numbers 21:25-26

21:25 So Israel took all these cities; and Israel settled in all the cities of the Amorites, in Heshbon, and in all its villages. 21:26 For Heshbon was the city of King Sihon of the Amorites. Now he had fought against the former king of Moab and had taken all of his land from his control, as far as the Arnon.

Numbers 21:28

21:28 For fire went out from Heshbon,

a flame from the city of Sihon.

It has consumed Ar of Moab

and the lords of the high places of Arnon.