Deuteronomy 6:7-9

Revised Standard Version

⁷ and 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. ⁸ And you shall bind them as a sign upon your hand, and they shall be as frontlets between your eyes. ⁹ And you shall write them on the doorposts of your house and on your gates.