1 Samuel 26:10-11
10-11He 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."
12David 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.