Deuteronomy 11:13-21

¹³“And it shall come about, if you listen obediently to my commandments which I am commanding you today, to love the Lord your God and to serve Him with all your heart and all your soul, ¹⁴that He will provide rain for your land in its season, the early and late rain, so that you may gather your grain, your new wine, and your oil. ¹⁵He will also provide grass in your field for your cattle, and you will eat and be satisfied. ¹⁶Beware that your hearts are not easily deceived, and that you do not turn away and serve other gods, and worship them. ¹⁷Otherwise, the anger of the Lord will be kindled against you, and He will shut up the sky so that there will be no rain, and the ground will not yield its produce; then you will quickly perish from the good land which the Lord is giving you.

¹⁸“You shall therefore take these words of mine to heart and to soul; and you shall tie them as a sign on your hand, and they shall be as frontlets on your forehead. ¹⁹You shall also teach them to your sons, speaking of them when you sit in your house, when you walk along the road, when you lie down, and when you get up. ²⁰And you shall write them on the doorposts of your house and on your gates, ²¹so that your days and the days of your sons may be increased on the land which the Lord swore to your fathers to give them, as long as the heavens are above the earth.