1 Samuel 24: 5-7

Afterward, David was conscience-stricken for having cut off a corner of his robe. He said to his men, “The Lord forbid that I should do such a thing to my master, the Lord’s anointed, or lay my hand on him; for he is the anointed of the Lord.” With these words David sharply rebuked his men and did not allow them to attack Saul. And Saul left the cave and went his way.