Deuteronomy 11:18-20

18Therefore shall ye lay up these my words in your heart and in your soul; and ye shall bind them for a sign upon your hand, and they shall be for frontlets between your eyes. 19And 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. 20And thou shalt write them upon the door-posts of thy house, and upon thy gates;