1 Samuel 26:18

David said to Abner, “Aren’t you a man? Who is like you in Israel? Why then have you not kept watch over your lord the king? For one of the people came in to destroy your lord the king.

This thing isn’t good that you have done. As the LORD lives, you are worthy to die, because you have not kept watch over your lord, the LORD’s anointed. Now see where the king’s spear is, and the jar of water that was at his head.”

Saul recognized David’s voice, and said, “Is this your voice, my son David?”

David said, “It is my voice, my lord, O king.”

Now therefore, please let my lord the king hear the words of his servant. If it is so that the LORD has stirred you up against me, let him accept an offering. But if it is the children of men, they are cursed before the LORD; for they have driven me out today that I shouldn’t cling to the LORD’s inheritance, saying, ‘Go, serve other gods!’

Now therefore, don’t let my blood fall to the earth away from the presence of the LORD; for the king of Israel has come out to seek a flea, as when one hunts a partridge in the mountains.”

Then Saul said, “I have sinned. Return, my son David; for I will no more do you harm, because my life was precious in your eyes today. Behold, I have played the fool, and have erred exceedingly.”