1 Samuel 26:7-9

New Century Version

⁷ So that night David and Abishai went into Saul’s camp. Saul was asleep in the middle of the camp with his spear stuck in the ground near his head. Abner and the army were sleeping around Saul. ⁸ Abishai said to David, “Today God has handed your enemy over to you. Let me pin Saul to the ground with my spear. I’ll only have to do it once. I won’t need to hit him twice.”

⁹ But David said to Abishai, “Don’t kill Saul! No one can harm the Lord’s appointed king and still be innocent!