Deuteronomy 11:18–20
"Therefore you shall lay up these words of mine in your heart and in your soul, and bind them as a sign on your hand, and they shall be as frontlets between your eyes. You shall teach them to your children, speaking of them when you sit in your house, when you walk by the way, when you lie down, and when you rise up. And you write them on the doorposts of your house and on your gates.
