Deuteronomy 6:6-9 And  these words that I command you today shall be on your heart. You shall teach  them diligently to your children, and shall talk of them when you sit in your  house, and when you walk by the way, and when you lie down, and when you  rise.  You shall bind them as a sign on your hand, and they shall be as  frontlets between your eyes.  You shall write them on the doorposts of your  house and on your gates.