4 But the Philistine commanders were angry. "Send him back to the town you've given him!" they demanded. "He can't go into the battle with us. What if he turns against us in battle and becomes our adversary? Is there any better way for him to reconcile himself with his master than by handing our heads over to him?
Matthew Henry's Commentary on 1 Samuel 29:4
Commentary on 1 Samuel 29:1-5
(Read 1 Samuel 29:1-5)
David waited with a secret hope that the Lord would help him out of his difficulty. But he seems to have been influenced too much by the fear of man, in consenting to attend Achish. It is hard to come near to the brink of sin, and not to fall in. God inclined the princes of the Philistines to oppose David's being employed in the battle. Thus their dislike befriended him, when no friend could do him such a kindness.