1 Samuel 29:1-6

1Now the Philistines gathered together all their armies to Aphek: and the Israelites encamped by a fountain which is in Jezreel. 2And the lords of the Philistines passed on by hundreds, and by thousands: but David and his men passed on in the rear with Achish. 3Then said the princes of the Philistines, What do these Hebrews here ? And Achish said to the princes of the Philistines, Is not this David, the servant of Saul the king of Israel, who hath been with me these days, or these years, and I have found no fault in him since he fell to me to this day? 4And the princes of the Philistines were angry with him; and the princes of the Philistines said to him, Make this fellow return, that he may go again to his place which thou hast appointed him, and let him not go down with us to battle, lest in the battle he should be an adversary to us: for how should he reconcile himself to his master? should it not be with the heads of these men? 5Is not this David, of whom they sang one to another in dances, saying, Saul slew his thousands, and David his ten thousands?

6Then Achish called David, and said to him, Surely, as the LORD liveth, thou hast been upright, and thy going out and thy coming in with me in the host is good in my sight: for I have not found evil in thee from the day of thy coming to me to this day: nevertheless the lords favour thee not.1