Deuteronomy 11:13-17

‘And it shall be that if you earnestly obey My commandments which I command you today, to love the LORD your God and serve Him with all your heart and with all your soul, then I will give you the rain for your land in its season, the early rain and the latter rain, that you may gather in your grain, your new wine, and your oil. And I will send grass in your fields for your livestock, that you may eat and be filled.’ “Take heed to yourselves, lest your heart be deceived, and you turn aside and serve other gods and worship them, lest the LORD’s anger be aroused against you, and He shut up the heavens so that there be no rain, and the land yield no produce, and you perish quickly from the good land which the LORD is giving you.