1 Samuel 26:8-10

New Century Version

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! ¹⁰ As surely as the Lord lives, the Lord himself will punish Saul. Maybe Saul will die naturally, or maybe he will go into battle and be killed.