Deuteronomy 11:19

16 Take heed to yourselves, lest your heart be deceived, and you turn aside, and serve other gods, and worship them;

17 and the anger of Yahweh be kindled against you, and he shut up the sky, so that there shall be no rain, and the land shall not yield its fruit; and you perish quickly from off the good land which Yahweh gives you.

18 Therefore shall you lay up these my words in your heart and in your soul; and you shall bind them for a sign on your hand, and they shall be for symbols between your eyes.

19 You shall teach them your children, talking 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.

20 You shall write them on the door-posts of your house, and on your gates;

21 that your days may be multiplied, and the days of your children, in the land which Yahweh swore to your fathers to give them, as the days of the heavens above the earth.

22 For if you shall diligently keep all this commandment which I command you, to do it, to love Yahweh your God, to walk in all his ways, and to cleave to him;