1 Samuel 24:4-6

4Then the men of David said to him, “This is the day of which the Lord said to you, ‘Behold, I will deliver your enemy into your hand, that you may do to him as it seems good to you.’ ” And David arose and secretly cut off a corner of Saul’s robe.

5Now it happened afterward that David’s heart troubled him because he had cut Saul’s robe.

6And he said to his men, “The Lord forbid that I should do this thing to my master, the Lord’s anointed, to stretch out my hand against him, seeing he is the anointed of the Lord.”