1 Samuel 26:7-12

So David and Abishai entered the encampment by night, and there he was—Saul, stretched out asleep at the center of the camp, his spear stuck in the ground near his head, with Abner and the troops sound asleep on all sides. Abishai said, “This is the moment! God has put your enemy in your grasp. Let me nail him to the ground with his spear. One hit will do it, believe me; I won’t need a second!” But David said to Abishai, “Don’t you dare hurt him! Who could lay a hand on GOD’s anointed and even think of getting away with it?” He went on, “As GOD lives, either GOD will strike him, or his time will come and he’ll die in bed, or he’ll fall in battle, but GOD forbid that I should lay a finger on GOD’s anointed. Now, grab the spear at his head and the water jug and let’s get out of here.” David took the spear and water jug that were right beside Saul’s head, and they slipped away. Not a soul saw. Not a soul knew. No one woke up! They all slept through the whole thing. A blanket of deep sleep from GOD had fallen on them.