King James Version
Yet the LORD would not destroy Judah for David his servant's sake, as he promised him to give him alway a light, and to his children.English Standard Version
Yet the LORD was not willing to destroy Judah, for the sake of David his servant, since he promised to give a lamp to him and to his sons forever.New International Version
Nevertheless, for the sake of his servant David, the LORD was not willing to destroy Judah. He had promised to maintain a lamp for David and his descendants forever.