Deuteronomy 2:20-22

20(That was also regarded as a land of giants; giants formerly dwelt there. But the Ammonites call them Zamzummim,

21a people as great and numerous and tall as the Anakim. But the Lord destroyed them before them, and they dispossessed them and dwelt in their place,

22just as He had done for the descendants of Esau, who dwelt in Seir, when He destroyed the Horites from before them. They dispossessed them and dwelt in their place, even to this day.