1 Samuel 24:5-7 NIV

[5] Afterward, David was conscience-stricken for having cut off a corner of his robe. [6] 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.” [7] 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.