1 Samuel 15:7; 1 Samuel 27:8

7 And Saul smote the Amalekites from Havilah until thou comest to Shur, that is over against Egypt.

8 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.