WEB
that you might fear Yahweh your God, to keep all his statutes and his commandments, which I command you, you, and your son, and your son’s son, all the days of your life; and that your days may be prolonged.
YLT
so that thou dost fear Jehovah thy God, to keep all His statutes and His commands, which I am commanding thee, thou, and thy son, and thy son’s son, all days of thy life, and so that thy days are prolonged.