Deuteronomy 11:18-19

¹⁸“You shall therefore impress these words of mine on your heart and on your soul; and you shall bind them as a sign on your hand, and they shall be as frontals on your forehead. ¹⁹You shall teach them to your sons, talking of them when you sit in your house and when you walk along the road and when you lie down and when you rise up.