Numbers 21
26 For Heshbon was the city of Sihon the king of the Amorites, who had fought against the former king of Moab, and taken all his land out of his hand, even to the Arnon.
27 Ref Therefore those who speak in proverbs say, Come you to Heshbon; Let the city of Sihon be built and established:
28 Ref For a fire is gone out of Heshbon, A flame from the city of Sihon: It has devoured Ar of Moab, The lords of the high places of the Arnon.