Мидраш к Брахо́т 9:8

The clouds draw water from the depths, as it is said, "He causeth the vapours to ascend from the ends of the earth" (Ps. 135:7), and in every place where the King commands them, there they cause rain (to fall), and forthwith the earth becomes fruitful and yields produce like a widow who becomes pregnant through debauchery. But when the Holy One, blessed be He, desires to bless the produce of the earth, and to give provision to the creatures, He opens the good treasuries in heaven and sends rain upon the earth, namely, the fructifying rain, and forthwith the earth becomes fruitful like a bride who conceives from her first husband and produces offspring of blessing, as it is said, "The Lord shall open unto thee his good treasury the heaven" (Deut. 28:12).

Rabbi Zadok said: On the 10th of Marcheshvan all the creatures entered the ark; on the 17th of the same (month) the waters of the Flood descended from heaven upon the earth, for they were the waters (endowed with the) male (principle). And there came up the waters of the depths, for they are the waters (endowed) with the female (principle), and they were joined with one another, and they prevailed so as to destroy || the world, as it is said, "And the waters prevailed exceedingly upon the earth" (Gen. 7:19).

And he led the flock until he came to Horeb, as it is said, "And he led the flock to the back of the wilderness, and came to the mountain of God, unto Horeb" (Ex. 3:1). There the Holy One, blessed be He, was revealed unto him from the midst of the thorn-bush. Moses saw the bush burning with fire, and the fire did not consume the bush, and the bush did not extinguish the flames of fire. Now the bush does not grow in the earth unless it has water beneath it. Moses saw and was wondering very much in his heart, and he said: What kind of glory is there in its midst? He said: I will now turn aside and see this great sight, why the thorn-bush is not burnt. The Holy One, blessed be He, said to him: Moses ! Stand where thou art standing, for there in the future will I give the Torah to Israel, as it is said, "And he said, Draw not nigh hither; put off thy shoes from off thy feet, for the place whereon thou standest is holy ground" (Ex. 3:5). The Holy One, blessed be He, said to him: Go. Hence (the sages) said: Anyone who enters the Temple must remove || his shoe, for thus spake the Holy One, blessed be He, to Moses: "Put off thy shoes from off thy feet" (ibid.).