“May the Lord repay every man for his righteousness and his faithfulness.”

This thing that you have done is not good. As the Lord lives, you deserve to die, because you have not guarded your master, the Lord’s anointed. And now see where the king’s spear is, and the jug of water that was by his head.” Then Saul knew David’s voice, and said, “ Is that your voice, my son David?” David said, “ It is my voice, my lord, O king.” And he said, “Why does my lord thus pursue his servant? For what have I done, or what evil is in my hand? Now therefore, please, let my lord the king hear the words of his servant: If the Lord has stirred you up against me, let Him accept an offering. But if it is the children of men, may they be cursed before the Lord, for they have driven me out this day from sharing in the inheritance of the Lord , saying, ‘Go, serve other gods.’ So now, do not let my blood fall to the earth before the face 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 harm you no more, because my life was precious in your eyes this day. Indeed I have played the fool and erred exceedingly.” And David answered and said, “Here is the king’s spear. Let one of the young men come over and get it. May the Lord  repay every man for his righteousness and his faithfulness; for the Lord delivered you into my hand today, but I would not stretch out my hand against the Lord’s anointed. And indeed, as your life was valued much this day in my eyes, so let my life be valued much in the eyes of the Lord, and let Him deliver me out of all tribulation.” Then Saul said to David, “ May you be blessed, my son David! You shall both do great things and also still prevail.” So David went on his way, and Saul returned to his place.
1 Samuel 26:5-25 - NKJV