1 Samuel 29:4-8

But the commanders of the Philistines were angry with him, and the commanders of the Philistines said to him, “Make the man go back, so that he will return to his place where you have assigned him, and do not let him go down to battle with us, or in the battle he may become an adversary to us. For how could this man find favor with his lord? Would it not be with the heads of these men?

Is this not David, of whom they sing in the dances, saying, ‘Saul has slain his thousands, And David his ten thousands’?”

Then Achish called David and said to him, “As the Lord lives, you have indeed been honest, and your going out and your coming in with me in the army are pleasing in my sight; for I have not found evil in you since the day of your coming to me to this day. Nevertheless, you are not pleasing in the sight of the governors.

Now then, return and go in peace, so that you will not do anything wrong in the sight of the governors of the Philistines.”

However, David said to Achish, “But what have I done? And what have you found in your servant since the day that I came before you, to this day, that I cannot go and fight against the enemies of my lord the king?”