Deuteronomy 11:18-20

And ye shall lay up these my words in your heart and in your soul, and bind them for a sign upon your hand, and they shall be for frontlets between your eyes. And ye shall teach them unto your children, speaking 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 write them upon the posts of thy house, and upon thy gates