David Musters with the Philistines

1 Samuel 28:1-2

Now in those days the Philistines gathered their forces for warfare against Israel. So Achish said to David, “You must understand that you and your men are to go out to battle with me.”

David replied, “Then you will come to know what your servant can do.” “Very well,” said Achish. “I will make you my bodyguard for life.”