1 Samuel 28:1-2

Revised Standard Version

28 In those days the Philistines gathered their forces for war, to fight against Israel. And A′chish said to David, “Understand that you and your men are to go out with me in the army.” ² David said to A′chish, “Very well, you shall know what your servant can do.” And A′chish said to David, “Very well, I will make you my bodyguard for life.”