1 Samuel 27:8-12

David and his men raided the people of Geshur, Girzi, and Amalek. (These people had lived for a long time in the land that reached to Shur and Egypt.) When David fought them, he killed all the men and women and took their sheep, cattle, donkeys, camels, and clothes. Then he returned to Achish. Achish would ask David, “Where did you go raiding today?” And David would tell him that he had gone to the southern part of Judah, or Jerahmeel, or to the land of the Kenites. David never brought a man or woman alive to Gath. He thought, “If we bring people alive, they may tell Achish, ‘This is what David really did.’ ” David did this all the time he lived in the Philistine land. So Achish trusted David and said to himself, “David’s own people, the Israelites, now hate him very much. He will serve me forever.”