1 Samuel 24:3-7

On the way he came to the sheepfolds where there was a cave; and Saul went in to relieve himself. Now David and his men were sitting in the cave’s innermost recesses. David’s men said to him, “Behold, this is the day of which the LORD said to you, ‘Behold, I will hand over your enemy to you, and you shall do to him as seems good to you.’ ” Then David arose [in the darkness] and stealthily cut off the hem (edge) of Saul’s robe. Afterward, David’s conscience bothered him because he had cut off the hem of Saul’s robe. He said to his men, “The LORD forbid that I should do this thing to my master, the LORD’S anointed, to put out my hand against him, since he is the anointed of the LORD.” So David strongly rebuked his men with these words and did not let them rise up against Saul. Saul got up, left the cave and went on his way.