1 Samuel 26:9

5 Then David set out and went to the place where Saul had camped. He saw the place where Saul and Abner son of Ner, the general of his army, had lain down. Saul was lying inside the inner circle of the camp, with the troops camped around him.

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

7 That 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. And Abner and the troops were lying around him.

8 Abishai said to David, “Today God has delivered your enemy into your hand. Now, therefore, please let me thrust the spear through him into the ground with one stroke. I will not need to strike him twice!”

9 But David said to Abishai, “Do not destroy him, for who can lift a hand against the LORD’s anointed and be guiltless?”

10 David added, “As surely as the LORD lives, the LORD Himself will strike him down; either his day will come and he will die, or he will go into battle and perish.

11 But the LORD forbid that I should stretch out my hand against the LORD’s anointed. Instead, take the spear and water jug by his head, and let us go.”

12 So David took the spear and water jug by Saul’s head, and they departed. No one saw them or knew about it, nor did anyone wake up; they all remained asleep, because a deep sleep from the LORD had fallen on them.

13 Then David crossed to the other side and stood atop the mountain at a distance; there was a wide gulf between them.

Read all of 1 Samuel 26