Hear, O Israel: The LORD our God is one LORD: And you shall love the LORD your God with all your heart, and with all your soul, and with all your might. And these words, which I command you this day, shall be in your heart: And you shall teach them diligently unto 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 up. And you shall bind them for a sign upon your hand, and they shall be as frontlets between your eyes. And you shall write them upon the doorposts of your house, and on your gates. (Deuteronomy 6:4-9)