1 Samuel 26:13-17

Then David crossed over to the other side and stood on top of the mountain at a distance with a large area between them.

And David called to the people and to Abner the son of Ner, saying, “Will you not answer, Abner?” Then Abner replied, “Who are you who calls to the king?”

So David said to Abner, “Are you not a man? And who is like you in Israel? Why then have you not guarded your lord the king? For one of the people came to kill the king your lord!

This thing that you have done is not good. As the Lord lives, all of you undoubtedly must die, because you did not guard your lord, the Lord’s anointed. And now, see where the king’s spear is and the jug of water that was at his head!”

Then Saul recognized David’s voice and said, “Is this your voice, my son David?” And David said, “It is my voice, my lord the king.”