1 Samuel 28:1-2
1 Samuel 28:1-2 AMP
In those days the Philistines gathered their forces for war to fight against Israel. Achish said to David, “Understand for certain that you and your men will go out with me to battle.” David said to Achish, “All right, you shall know what your servant can do.” So Achish said to David, “Therefore I will make you my bodyguard for life.”