Numbers 21:25-27

²⁵Therefore Israel took all his cities, and dwelled in the cities of Amorites, that is, in Heshbon, and in his towns.

²⁶The city of Heshbon was Sihon’s, king of Amorites, which Sihon fought against the king of Moab, and took all the land that was of his lordship, till to Arnon.

²⁷Therefore it is said in proverb, Come ye into Heshbon, be it builded, and made, the city of Sihon;