Midrash sa Job 37:21: Ein Yaakov (Glick Edition), Otzar Midrashim & Vayikra Rabbah

R. Sala said again, in the name of R. Hamnuna: "The man who is insolent will finally stumble into idolatry; as it is said (Ib.) Yet thou hadst a harlot's forehead." And R. Nachman b. Isaac said: "An insolent man must be considered as having already stumbled into idolatry; for the passage says, thou hadst, and not thou wilt have." Rabba b. Huna said: "An insolent man may be classed with the wicked; as it is said (Pr. 21, 29) A wicked man showeth impudence in his face." And R. Nachman b. Isaac said: "It is even permitted to hate him; as it is said (Ecc. 8, 1) Aiid the boldness of his face Yeshuna (is changed). Do not read Yeshuna, but Yisanei (may be hated)." R. Joseph said: "We infer it from here [that rain is withheld on account of neglect to study the Torah] (Job 37, 21) Yet men see not the light which is bright in the skies. But the wind passeth along, and cleanseth them; i.e., light refers to the Torah; as it is said (Prov. 6, 23) For the commandment is a lamp, and the Torah is light; Which is bright in the skies, was explained in the college of R. Ishmael: 'Even when the sky is full of clouds and dew, the wind will clear them away.' "

The Raavya (19th chapter) wrote that originally it was called Midrash Rabbi Nehunya ben HaKana (and so it is referred to by the Ramban and the Tzioni), after its opening "Said Rabbi Nehunya ben HaKana" (even though his name is not mentioned a second time in this book), and afterwards there was uncertainty whether he authored it, so they called it Sefer HaBahir, from the verse it opens with "Pure it is in the skies" (Job 37:21).

“Now they do not see the light” (Job 37:21). It is taught: One who sees the sun in its brightness, the moon in its roundness, the planets in their orbit, or the signs of the zodiac aligned in their order, recites: Blessed…Who performed the act of Creation. Rav Huna said: That which you said applies during the rainy season provided that it is after three days.¹³If the sun or the moon could not be seen for three days due to clouds, this blessing is recited when they again become visible.
“Now they do not see the light.” Rabbi Berekhya and Rabbi Yirmeya son of Rabbi Ḥiyya bar Abba said: Rabbi Levi bar Sisi expounded in Neherde’a: “They saw the God of Israel [and under His feet was like a configuration of sapphire brick and like the very heavens in purity]” (Exodus 24:10). This was before they were redeemed. However, once they were redeemed, it was placed in a location a brick would typically be placed.¹⁴Before Israel was redeemed from Egypt, God had under His feet, as it were, a sapphire brick, in order to identify with their suffering “with mortar and bricks” (Exodus 1:14). After they were redeemed the brick was no longer under God’s feet. Instead, under His feet was a view “like the very heavens in purity.”
Rabbi Berekhya said: “A configuration of sapphire brick” is not written here, but rather, “like the configuration”; it and all its accessories were placed. It and its basket and its trowel were placed. Bar Kappara said: Before Israel was redeemed from Egypt, its imprint was in the sky. Once they were redeemed, it was no longer visible in the sky. What is the source? “Like the very heavens in purity,” when it is cloud free.