Deuteronomy 11:13-17

If you carefully obey the commands I am giving you today and love the LORD your God and serve him with your whole being, then he will send rain on your land at the right time, in the fall and spring, and you will be able to gather your grain, new wine, and oil. He will put grass in the fields for your cattle, and you will have plenty to eat. Be careful, or you will be fooled and will turn away to serve and worship other gods. If you do, the LORD will become angry with you and will shut the heavens so it will not rain. Then the land will not grow crops, and you will soon die in the good land the LORD is giving you.