1 Samuel 26:6-9

6Then David asked Ahimelech the Hethite and Joab’s brother Abishai son of Zeruiah, “Who will go with me into the camp to Saul?” “I’ll go with you,” answered Abishai.

7That night, David and Abishai came to the troops, and Saul was lying there asleep in the inner circle of the camp with his spear stuck in the ground by his head. Abner and the troops were lying around him.

8Then Abishai said to David, “Today God has delivered your enemy to you. Let me thrust the spear through him into the ground just once. I won’t have to strike him twice!”

9But David said to Abishai, “Don’t destroy him, for who can lift a hand against the Lord’s anointed and be innocent?”