And David and his men went up, and invaded the Geshurites, and the Gezrites, and the Amalekites: for those nations were of old the inhabitants of the land, as thou goest to Shur, even unto the land of Egypt.
David and his group attacked the Geshurites, Gezrites, and Amalekites because these nations had lived in the land for a long time, from Shur to the land of Egypt.