1 Samuel 26:7-11King James Version (KJV)
7 So 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 bolster: but Abner and the people lay round about him.
8 Then 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.
9 And David said to Abishai, Destroy him not: for who can stretch forth his hand against the Lord's anointed, and be guiltless?
10 David said furthermore, As the Lord liveth, the Lord shall smite him; or his day shall come to die; or he shall descend into battle, and perish.
11 The Lord forbid that I should stretch forth mine hand against the Lord's anointed: but, I pray thee, take thou now the spear that is at his bolster, and the cruse of water, and let us go.