Numbers 21:24-25

²⁴And he was slain by them with the edge of the sword, and they possessed his land from the Arnon unto the Jeboc, and to the confines of the children of Ammon: for the borders of the Ammonites, were kept with a strong garrison.

²⁵So Israel took all his cities, and dwelt in the cities of the Amorrhite, to wit, in Hesebon, and in the villages thereof.