1 Samuel 24:4-7

The men said to David, “Today is the day the LORD spoke of when he said, ‘I will give your enemy over to you. Do anything you want with him.’ ” Then David crept up to Saul and quietly cut off a corner of Saul’s robe. Later David felt guilty because he had cut off a corner of Saul’s robe. He said to his men, “May the LORD keep me from doing such a thing to my master! Saul is the LORD’s appointed king. I should not do anything against him, because he is the LORD’s appointed king!” David used these words to stop his men; he did not let them attack Saul. Then Saul left the cave and went his way.