1 Samuel 26:7-9

New Revised Standard Version, Anglicised

⁷ So David and Abishai went to the army by night; there Saul lay sleeping within the encampment, with his spear stuck in the ground at his head; and Abner and the army lay around him. ⁸ Abishai said to David, ‘God has given your enemy into your hand today; now therefore let me pin him to the ground with one stroke of the spear; I will not strike him twice.’ ⁹ But David said to Abishai, ‘Do not destroy him; for who can raise his hand against the Lord’s anointed, and be guiltless?’