Numbers 21:25-27

²⁵And Israel took all their towns, living in Heshbon and all the towns and small places of the Amorites.

²⁶For Heshbon was the town of Sihon, king of the Amorites, who had made war against an earlier king of Moab and taken from him all his land as far as the Arnon.

²⁷So the makers of wise sayings say, Come to Heshbon, building up the town of Sihon and making it strong: