1 Samuel 29:8 in the King James Version
And David said unto Achish, But what have I done? and what hast thou found in thy servant so long as I have been with thee unto this day, that I may not go fight against the enemies of my lord the king?
Context
7 Therefore now return, and go in peace, that you not displease the lords of the Philistines.”
8 David said to Achish, “But what have I done? What have you found in your servant so long as I have been before you to this day, that I may not go and fight against the enemies of my lord the king?”
9 Achish answered David, “I know that you are good in my sight, as an angel of God. Notwithstanding, the princes of the Philistines have said, ‘He shall not go up with us to the battle.’