1 Samuel 24:6-10

6He 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.”

7So 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.

8Then David also got up afterward and went out of the cave and called after Saul, saying, “My lord the king!” And when Saul looked behind him, David bowed with his face to the ground and lay himself face down.

9David said to Saul, “Why do you listen to the words of men who say, ‘David seeks to harm you?’

10Behold, your eyes have seen today how the Lord had given you into my hand in the cave. Some told me to kill you, but I spared you; I said, ‘I will not reach out my hand against my lord, for he is the Lord’s anointed.’