1 Samuel 24:3-7

He came to the sheepfolds on the way, where there was a cave; and Saul went in to relieve himself. Now David and his men were sitting in the inner recesses of the cave. The men of David said to him, “Behold, this is the day of which the LORD said to you, ‘Behold; I am about to give your enemy into your hand, and you shall do to him as it seems good to you.’ ” Then David arose and cut off the edge of Saul’s robe secretly. It came about afterward that David’s conscience bothered him because he had cut off the edge of Saul’s robe. So he said to his men, “Far be it from me because of the LORD that I should do this thing to my lord, the LORD’S anointed, to stretch out my hand against him, since he is the LORD’S anointed.” David persuaded his men with these words and did not allow them to rise up against Saul. And Saul arose, left the cave, and went on his way.