These commandments that I give you today are to be upon your hearts.  Impress them on your children. Talk about them when you sit at home and when you walk along the road, when you lie down and when you get up.  Tie them as symbols on your hands and bind them on your foreheads.  Write them on the door frames of your houses and on your gates.
2. Spiritually responsible head of household, including the housefather as assisted by the housemother.
>> Example: "As the Hausvater should teach it [Christian doctrine] to the entire family ..."
(Martin Luther, Small Catechism, 1529)