1 Samuel 27:11-12

New King James Version

¹¹ David would save neither man nor woman alive, to bring news to Gath, saying, “Lest they should inform on us, saying, ‘Thus David did.’ ” And thus was his behavior all the time he dwelt in the country of the Philistines. ¹² So Achish believed David, saying, “He has made his people Israel utterly abhor him; therefore he will be my servant forever.”