1 Samuel 26:7-12

7So David and Abishai came to the people by night: and, behold, Saul lay sleeping within the trench, and his spear stuck in the ground at his head: but Abner and the people lay round about him.

8Then said Abishai to David, God hath delivered thine enemy into thine hand this day: now therefore let me smite him, I pray thee, with the spear even to the earth at once, and I will not smite him the second time.1

9And David said to Abishai, Destroy him not: for who can stretch forth his hand against Yhwh's anointed, and be guiltless?

10David said furthermore, As Yhwh liveth, Yhwh shall smite him; or his day shall come to die; or he shall descend into battle, and perish.

11Yhwh forbid that I should stretch forth mine hand against Yhwh's anointed: but, I pray thee, take thou now the spear that is at his head, and the cruse of water, and let us go.

12So David took the spear and the cruse of water from Saul’s head; and they gat them away, and no man saw it, nor knew it, neither awaked: for they were all asleep; because a deep sleep from Yhwh was fallen upon them.