1 Samuel 27:11-14 (New International Version)

¹¹ He did not leave a man or woman alive to be brought to Gath, for he thought, "They might inform on us and say, 'This is what David did.' " And such was his practice as long as he lived in Philistine territory. ¹² Achish trusted David and said to himself, "He has become so odious to his people, the Israelites, that he will be my servant forever."