1 Samuel 29:7-9

Young's Literal Translation

⁷ and now, turn back, and go in peace, and thou dost do no evil in the eyes of the princes of the Philistines.'

⁸ And David saith unto Achish, `But what have I done? and what hast thou found in thy servant from the day that I have been before thee till this day -- that I go not in and have fought against the enemies of my lord the king?'

⁹ And Achish answereth and saith unto David, `I have known that thou [art] good in mine eyes as a messenger of God; only, the princes of the Philistines have said, He doth not go up with us into battle;