1 Samuel 24:3-8

3And he came to the sheepfolds by the way, where was a cave; and Saul went in to cover his feet; and David and his men were abiding in the recesses of the cave.

4And David's men said to him, Behold the day of which Jehovah said to thee, Behold, I will give thine enemy into thy hand, that thou mayest do to him as it shall seem good to thee. And David arose, and cut off the skirt of Saul's robe secretly.

5And it came to pass afterwards that David's heart smote him, because he had cut off Saul's skirt.

6And he said to his men, Jehovah forbid that I should do this thing to my master, Jehovah's anointed, to stretch forth my hand against him, for he is the anointed of Jehovah.

7And David checked his men with these words, and suffered them not to rise against Saul. And Saul rose up out of the cave, and went on [his] way.

8David also arose afterwards, and went out of the cave, and cried after Saul, saying, My lord the king! And when Saul looked behind him, David bowed with his face to the earth, and did obeisance.