Deuteronomy 11:13-17

13So if you carefully obey the commandments I am giving you today, to love the LORD your God and to serve Him with all your heart and with all your soul, 14then I will provide1 rain for your land in season, the autumn and spring rains, that you may gather your grain, new wine, and oil. 15And I will provide grass in the fields for your livestock, and you will eat and be satisfied.

16But be careful that you are not enticed to turn aside to worship and bow down to other gods, 17or the anger of the LORD will be kindled against you. He will shut the heavens so that there will be no rain, nor will the land yield its produce, and you will soon perish from the good land that the LORD is giving you.