1 Samuel 29:4

And the princes of the Philistines were wroth with him, that is, the rulers of the four other city-states; and the princes of the Philistines said unto him, Make this fellow return that he may go again to his place which thou hast appointed him, to Ziklag, and let him not go down with us to battle, lest in the battle he be an adversary to us; for wherewith should he reconcile himself unto his master? Should it not be with the heads of these men? They felt that it would be the best opportunity for David and his men to reinstate themselves in the favor of Saul by defeating apart of the Philistine army.