Deuteronomy 11:18-20

“Therefore, you shall impress these words of mine on your heart and on your soul, and tie them as a sign on your hand, and they shall be as bands (frontals, frontlets) on your forehead. You shall teach them [diligently] to your children [impressing God’s precepts on their minds and penetrating their hearts with His truths], speaking 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. You shall write them on the doorposts of your house and on your gates