1 Samuel 26:6-11

26:6 David said to Ahimelech the Hittite and Abishai son of Zeruiah, Joab’s brother, “Who will go down with me to Saul in the camp?” Abishai replied, “I will go down with you.”

26:7 So David and Abishai approached the army at night and found Saul lying asleep in the entrenchment with his spear stuck in the ground by his head. Abner and the army were lying all around him. 26:8 Abishai said to David, “Today God has delivered your enemy into your hands. Now let me drive the spear right through him into the ground with one swift jab! A second jab won’t be necessary!”

26:9 But David said to Abishai, “Don’t kill him! Who can extend his hand against the Lord’s chosen one and remain guiltless?” 26:10 David went on to say, “As the Lord lives, the Lord himself will strike him down. Either his day will come and he will die, or he will go down into battle and be swept away. 26:11 But may the Lord prevent me from extending my hand against the Lord’s chosen one! Now take the spear by Saul’s head and the jug of water, and let’s get out of here!”