Deuteronomy 6:6-9
6 Keep these words that I am commanding you today in your heart. 7 Recite them to your children and talk about them when you are at home and when you are away, when you lie down and when you rise. 8 Bind them as a sign on your hand, fix them as an emblem on your forehead, 9 and write them on the doorposts of your house and on your gates.