1 Samuel 26:9-11

9But David said to Abishai, “Do not destroy him, for who can extend a hand against the LORD’s anointed and be guiltless?” 10David 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. 11But the LORD forbid that I should extend my hand against the LORD’s anointed. Instead, take the spear and water jug by his head, and let us go.”