מדרש אויף תהילים 135:7

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 Yoḥanan and Rabbi Shimon ben Lakish, Rabbi Yoḥanan said: Clouds come only from above, as it is stated: “And behold, among the clouds of the heavens” (Daniel 7:13). Rabbi Shimon ben Lakish said: Clouds come only from below, as it is stated: “He makes clouds ascend from the ends of the earth” (Psalms 135:7). According to the opinion of Rabbi Yoḥanan, it is analogous to one who gifts someone a cask of wine along with its pitcher. Rabbi Shimon says: It is analogous to one who said to another: ‘Lend me a se’a of wheat.’ He says to him: ‘Bring your basket and come measure [the wheat] into it.’ So, the Holy One blessed be He says to the earth: ‘Bring your clouds and receive rain.’