1 Samuel 24:3-5

24:3 He came to the sheepfolds by the road, where there was a cave. Saul went into it to relieve himself.

Now David and his men were sitting in the recesses of the cave. 24:4 David’s men said to him, “This is the day about which the Lord said to you, ‘I will give your enemy into your hand, and you can do to him whatever seems appropriate to you.’” So David got up and quietly cut off an edge of Saul’s robe. 24:5 Afterward David’s conscience bothered him because he had cut off an edge of Saul’s robe.