Deuteronomy 2:20 in the King James Version
(That also was accounted a land of giants: giants dwelt therein in old time; and the Ammonites call them Zamzummims;
Context
19 When you come near the border of the children of Ammon, don’t bother them, nor contend with them; for I will not give you any of the land of the children of Ammon for a possession, because I have given it to the children of Lot for a possession.”
20 (That also is considered a land of Rephaim. Rephaim lived there in the past, but the Ammonites call them Zamzummim,
21 a great people, many, and tall, as the Anakim; but the LORD destroyed them from before Israel, and they succeeded them, and lived in their place,