Deuteronomy 11:13-17

13 And it shall come to pass, if you shall listen diligently to my commandments which I command you this day, to love the LORD your God, and to serve him with all your heart and with all your soul,

14 That I will give you the rain of your land in his due season, the first rain and the latter rain, that you may gather in your corn, and your wine, and your oil.

15 And I will send grass in your fields for your cattle, that you may eat and be full.

16 Take heed to yourselves, that your heart be not deceived, and you turn aside, and serve other gods, and worship them;

17 And then the LORD's wrath be kindled against you, and he shut up the heaven, that there be no rain, and that the land yield not her fruit; and lest you perish quickly from off the good land which the LORD gives you.