Deuteronomy 11:21 in the World English Bible
that your days and your children’s days may be multiplied in the land which the LORD swore to your fathers to give them, as the days of the heavens above the earth.
Context
20 And thou shalt write them upon the door posts of thine house, and upon thy gates:
21 That your days may be multiplied, and the days of your children, in the land which the LORD sware unto your fathers to give them, as the days of heaven upon the earth.
22 For if ye shall diligently keep all these commandments which I command you, to do them, to love the LORD your God, to walk in all his ways, and to cleave unto him;