1 Samuel 28:1-3

Samuel had died some time earlier, and people from all over Israel had attended his funeral in his hometown of Ramah. Meanwhile, Saul had been trying to get rid of everyone who spoke with the spirits of the dead. But one day the Philistines brought their soldiers together to attack Israel. Achish told David, “Of course, you know that you and your men must fight as part of our Philistine army.” David answered, “That will give you a chance to see for yourself just how well we can fight!” “In that case,” Achish said, “you and your men will always be my bodyguards.”