And these words, which I command thee this day, shall be in thine heart: And thou shalt teach them diligently unto thy children, and shalt talk of them when thou sittest in thine house, and when thou walkest by the way, and when thou liest down, and when thou risest up. And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes. And thou shalt write them upon the posts of thy house, and on thy gates.
The instruction that follows the Shema: keep these words in your own heart first, then speak them sitting at home, walking the road, lying down, getting up. Teaching here is not a lesson at a set hour but the ordinary talk of a household.