1 Samuel 27:8,9
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 you go to Shur, even to the land of Egypt.
Nave's Topical Index—AKJV

1 Samuel 30:1-20
And it came to pass, when David and his men were come to Ziklag on the third day, that the Amalekites had invaded the south, and Ziklag, and smitten Ziklag, and burned it with fire;
Nave's Topical Index—AKJV