Yet for the sake of His servant David, the LORD was unwilling to destroy Judah, since He had promised to maintain a lamp for David and his descendants forever.
KJV
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.
ASV
Howbeit Jehovah would not destroy Judah, for David his servant’s sake, as he promised him to give unto him a lamp for his children alway.