'Fail' in the Bible

And now, Jehovah, God of Israel, keep with thy servant David my father that which thou hast promised him saying, There shall not fail thee a man in my sight to sit on the throne of Israel, if only thy sons take heed to their way to walk in my law, as thou hast walked before me.

then will I establish the throne of thy kingdom, according as I have covenanted with David thy father, saying, There shall not fail thee a man to rule over Israel.