1 Samuel 24:17-19

He said to David, “You are more righteous than I; for you have dealt well with me, while I have dealt wickedly with you. You have declared today that you have done good to me, that the LORD delivered me into your hand and yet you did not kill me. For if a man finds his enemy, will he let him go away safely? May the LORD therefore reward you with good in return for what you have done to me this day.