Deuteronomy 11:16-17

That your heart be not deceived By the specious pretence of idolaters, persuading you that they enjoy fruitful seasons, and other temporal blessings, as a reward for their worship. And he shut up the heaven Withhold rain from you, which will be a sore judgment, quickly bringing a famine, whereby you will be wasted and consumed. Here, and elsewhere, heaven is compared to a great store-house, wherein God lays up his treasures of dew and rain, (Job 38:22,) the doors whereof God is said to open when he gives rain, and to shut when he withholds it.