1 Samuel 27:8-9

From time to time David and his men raided the Geshurites, the Girzites, and the Amalekites—these people were longtime inhabitants of the land stretching toward Shur and on to Egypt. When David raided an area he left no one alive, neither man nor woman, but took everything else: sheep, cattle, donkeys, camels, clothing—the works. Then he’d return to Achish.