1 Samuel 24:6-7

“He said to his men, “Yahweh forbid that I should do this thing to my lord, Yahweh’s anointed, to stretch out my hand against him, since he is Yahweh’s anointed.” So David checked his men with these words, and didn’t allow them to rise against Saul. Saul rose up out of the cave, and went on his way.”