Deuteronomy 6:6-9

And these words, which I command thee this day, shall be in thy heart; and thou shalt impress them on thy sons, and shalt talk of them when thou sittest in thy house, and when thou goest on the way, and when thou liest down, and when thou risest up. And thou shalt bind them for a sign on thy hand, and they shall be for frontlets between thine eyes. And thou shalt write them upon the posts of thy house, and upon thy gates.