Midrasch zu Schemot 10:22

Another matter, “have you seen a man diligent…,” this is Moses in the labor of [constructing] the Tabernacle; therefore, “he will stand before kings,” this is Pharaoh, as it is stated “Arise early in the morning and stand before Pharaoh” (Exodus 8:16). “He will not stand before dark ones,” this is Yitro. Rabbi Neḥemya said: You have rendered the sacred profane; rather, “he will stand before kings,” this is the King of kings, the Holy One blessed be He, as it is stated: “He was there with the Lord forty days” (Exodus 34:28). “He will not stand before dark ones,” this is Pharaoh, as it is stated: “There was a thick darkness [in the entire land of Egypt]” (Exodus 10:22).²Pharaoh is referred to as dark because his land became dark. Alternatively, the reference is due to the fact that Moses announced that he would no longer come to see Pharaoh after the plague of darkness (see Exodus 10:29).

And Moses stretched forth his hand toward heaven; and there was a thick darkness in all the land of Egypt three days (Exod. 10:22). Our sages maintained: There were seven days of darkness. During the first three days, a person who was sitting could stand if he wished to do so, and so too one who was standing could sit down. During the final three days, those who were sitting were unable to stand, those who were standing were unable to sit, and those who were reclining were unable to arise. Whence do we know this? From the fact that it is said; And they saw not one another for three days (ibid., v. 23). Hence for three days they could not change their positions, and for three days they could not arise from their places.

(Exod. 10:22:) AND THERE WAS THICK DARKNESS IN ALL THE LAND OF EGYPT FOR THREE DAYS. There were < actually > seven days of darkness over the Egyptians.¹⁰Tanh., Exod. 3:3; Exod. R. 14:3. For the first three days whoever was sitting and wanted to stand would stand, and whoever was standing and wanted to sit would sit. Then for the next three days whoever was sitting was unable to stand and whoever was {sitting} [standing] was unable to sit.¹¹Tanh., Exod. 3:3, and Exod. R. 14:3 explains how the two sets of three days are derived from Exod. 10:22–23. First THERE WAS A THICK DARKNESS IN ALL THE LAND OF EGYPT FOR THREE DAYS WHEN THEY COULD NOT SEE ONE ANOTHER. THEN FOR THREE DAYS NO ONE COULD GET UP FROM WHERE HE WAS. Here are six <days>. And which day was the seventh? The one of which it is stated (in Exod. 14:20): THUS THERE WAS THE CLOUD AND THE DARKNESS WHICH LIT UP THE NIGHT. The cloud was in Egypt; and while it gave light to Israel, it was darkened for Egypt, as stated (in Exod. 10:23): BUT ALL THE CHILDREN OF ISRAEL HAD LIGHT IN THEIR DWELLINGS. Now, Israel entered the houses of the Egyptians, and whatever the Egyptians had, Israel searched out and looked at <them>. So, when the Holy One said to Israel (in Exod. 3:22): BUT EACH WOMAN SHALL BORROW < OBJECTS OF SILVER, OBJECTS OF GOLD, AND CLOTHING > FROM HER NEIGHBOR AND FROM THE WOMAN WHO SOJOURNS IN HER HOUSE…, Israel entered in among the Egyptians. Then, when each and every one would say to his companion and neighbor: Lend me that object which you have, and when he would say: I do not have it, he would say: I know that you have it, and here it is in your chest. See, it is in such and such a place. I saw it in your hand. So he lent him that object. And how did Israel know this? It is simply that in those days of darkness they had entered their houses and seen their silver, their gold, and whatever objects they had. R. Abbin the Levite said: Also when the plague of blood came over the Egyptians,¹²Cf. above 2:14. the Nile was turned into blood, as stated (in Exod. 7:24): AND ALL THE EGYPTIANS DUG AROUND THE NILE FOR WATER TO DRINK, < BECAUSE THEY COULD NOT DRINK THE WATER OF THE NILE>. What did they do? They saw Israel filling its casks from the Nile. So they went after them and sought water to drink from them, but it became blood within their mouths. R. Abbin said: Whatever they bought from Israel for a price they drank as water. Since it is impossible for anyone to exist without water, they bought water from Israel and thereby enriched Israel. [So also here, when the plague of darkness came upon them, they were acquainted with the Egyptians' houses and thereby <the Egyptians > made Israel rich.]

What was the seventh day like? And there was the cloud and the darkness here, yet gave it light (Exod. 14:20). This light resembled the light experienced at the sea. Similarly in Egypt the cloud gave light to the Israelites but darkness to the Egyptians, as it is said: They saw not.

... …and the Holy One said to Israel, ‘my children – now take from me the cup of consolation.’ They replied to Him ‘Master of the World! You were angry with us and brought us out from within Your house and exiled us among the nations of the world [and that is like a vessel cast aside among the nations of the world] and now you’ve come to appease us?! He said to them, ‘I will give you an allegory, to what is this thing to be likened? To a man who married his sister’s daughter. He grew angry with her and sent her out of his house, and after some days came to appease her. She said to him ‘you were angry with me and threw me out of your house and now you’ve come to appease me?!’ He said to her, ‘you are are my sister’s daughter, maybe you will say in your heart that from the day that you went out of my house [another woman entered in, by your life] even I have not entered my house.’ Thus the Holy One said to Israel, ‘my children, from the day I destroyed My house below I have not gone up and sat in My house above. Rather, I sat in the dew and the rain. If you do not believe me place your hands in My head [and see the dew which is on My head, if it were not an explicit verse it would be impossible to say] as it says “…for my head is full of dew, my locks with the drops of the night.” (Shir HaShirim 5:2) And the Holy One clothed Zion with her strength, in reward for “The Eternal's strength and His vengeance were my salvation…” (Shemot 15:2) which they said at the sea, [and from where do we learn that the Holy One clothes her in her strength?] as it says “Awaken, awaken, put on your strength, O Zion…” (Yeshayahu 52:1)

“The fig tree has formed its unripe figs, and the vines in blossom have emitted fragrance. Rise, my love, my fair one, and go” (Song of Songs 2:13).
“The fig tree has formed its unripe figs,” these are the Jewish sinners who died during the three days of pitch darkness, as it is stated: “Moses extended his hand at the heavens and there was [pitch] darkness…they did not see one another” (Exodus 10:22).¹¹¹See Shemot Rabba 14:3. “The vines in blossom have emitted fragrance,” these are the remainder, who repented and were redeemed. Moses came to them and said to them: ‘You have such good fragrance and you are sitting here? “Rise, my love, my fair one.”’

"And Moses stretched out his hand to the heavens and a behold, a thick darkness." Where did this darkness come from? Rabbi Judah and Rabbi Nechemia [debate]. Rabbi Judah says the darkness came from above as it says (Psalms 18:12) He made darkness his secret place; his pavilion round about him... Rabbi Nechemia says the darkness comes from below (gehinom) as it says (Job 10:22) A land of gloom, as darkness itself; and of the shadow of death, without any order...