Deuteronomy 11:19-21

And ye shall teach them your children, talking of them, when thou sittest in thy house, and when thou walkest by the way, and when thou liest down, and when thou risest up. And thou shalt write them upon the door-posts of thy house, and upon thy gates; that your days may be multiplied, and the days of your children, in the land which Jehovah sware unto your fathers to give them, as the days of the heavens above the earth.