It was reputed to be a land of giants. And giants lived there in times past, those whom the Ammonites call the Zamzummim
Other versions
King James Version
(That also was accounted a land of giants: giants dwelt therein in old time; and the Ammonites call them Zamzummims; English Standard Version
(It is also counted as a land of Rephaim. Rephaim formerly lived there--but the Ammonites call them Zamzummim--New International Version
(That too was considered a land of the Rephaites, who used to live there; but the Ammonites called them Zamzummites.