Genesis 2:4-6

For herbs and trees are produced from seed; or grafts are taken from another root, or they grow by putting forth shoots: in all this the industry and the hand of man are engaged. But, at that time, the method was different: God clothed the earth, not in the same manner as now, (for there was no seed, no root, no plant, which might germinate,) but each suddenly sprung into existence at the command of God, and by the power of his word. They possessed durable vigour, so that they might stand by the force of their own nature, and not by that quickening influence which is now perceived, not by the help of rain, not by the irrigation or culture of man; but by the vapour with which god watered the earth. For he excludes these two things, the rain whence the earth derives moisture, that it may retain its native sap; and human culture, which is the assistant of nature. When he says, that God had “not yet caused it to rain,” he at the same time intimates that it is God who opens and shuts the cataracts of heaven, and that rain and drought are in his hand.