Midras Keluaran 32:30: Devarim Rabbah, Seder Olam Rabbah & Midrash Tanchuma

Another matter: “These are the words” – this is what the verse said: “One who rebukes a man will later find more favor than one with a slippery tongue” (Proverbs 28:23). Rabbi Pinḥas said in the name of Rabbi Ḥama bar Ḥanina: “One who rebukes” – this is Moses. “A man” – this is Israel, as it is stated: “You are My flock, flock of My pasture, you are man” (Ezekiel 34:31). What is “later [aḥarai]”? The Holy One blessed be He said: ‘In order to bring them after Me [aḥarai].’¹The word aḥarai can be a form of the word aḥarei, later, or aḥar, after, in which case aḥarai would mean “after me.” “Will…find…favor” – this is Moses, as it is written: “And you also found favor in My eyes” (Exodus 33:12). “Than one with a slippery tongue” – this is Bilam, who was slippery-tongued in his prophecies,²Bilam was slippery tongued in the manner in which he expressed his prophetic blessings of Israel, meaning that he flattered them excessively. and they [the Israelites] became haughty and stumbled in Shitim.³They grew haughty as a result of his blessings, and this led to their sinning with the daughters of Moav (see Numbers 25:1–3).
Another matter, “one who rebukes a man will later [aḥarai]” – Rabbi Yehuda ben Rabbi Simon said: What is aḥarai? The Holy One blessed be He said: ‘Moses, as it were, rebuked Me to follow Israel, and rebuked Israel to follow Me [aḥarai].’ To Israel, he said: “You have sinned” (Exodus 32:30). To the Holy One blessed be He, he said: “Why should Your wrath be enflamed against Your people?” (Exodus 32:11). What is “why”?⁴After all, this was stated in the immediate aftermath of the egregious sin of the Golden Calf. Rabbi Yitzḥak said: When Israel crafted the calf, the Holy One blessed be He sought to eradicate Israel’s enemies.⁵This is a euphemistic reference to Israel. Moses said to Him: ‘Master of the universe, this calf is useful to assist You.’ The Holy One blessed be He said to him: ‘In what way can it assist Me?’ Moses said to Him: ‘If You cause the rain to fall, it can cause the dew to rise; You can produce the winds, and it, the lightning.’ The Holy One blessed be He said to him: ‘Are you, too, straying after the calf?’⁶How can you ascribe any power to this inanimate object? Moses said before Him: ‘Then, “why should Your wrath be enflamed against Your people?”’⁷Moses argued that God should not appear to be jealous of an object that actually has no power (Maharzu; see also Etz Yosef).
To Israel he said: “You have sinned a great sin” (Exodus 32:30). Rabbi Yehuda ben Rabbi Simon said: To what is this matter comparable? To a king who became angry at his wife. He struck her and expelled her from his house. The groomsmen heard about this. They went to the king and said to him: ‘Oh, my lord, is this what a man does to his wife? What did she do to you?’ They went to her and said to her: ‘Until when will you anger him? Is it your first time? Is it your second time?’ Moses, too, when he went to the Holy One blessed be He, he said to Him: ‘“Why should your wrath be enflamed against your people,” are they not Your children?’ When he went to Israel, he said to them: ‘Until when will you anger Him? Is it your first time? Is it your second time?’ Likewise it says: “In the wilderness, in the Arava, opposite the Red Sea.”⁸Moses, in mentioning these places to the Israelites, was alluding to various occasions on which they angered God.

On the seventh day after the Ten Commandments Moshe went up on the mountain, as it says "The Presence of the LORD abode on Mount Sinai, and the cloud hid it for six days..." (Shemot 24:16) This was in order for Moshe to purify himself. "On the seventh day He called to Moses from the midst of the cloud." (ibid.) "Moses went inside the cloud and ascended the mountain; and Moses remained on the mountain forty days and forty nights." (Shemot 24:18) On the 17th of Tammuz he came down and shattered the tablets, "The next day Moses said to the people, “You have been guilty of a great sin. Yet I will now go up to the LORD; perhaps I may win forgiveness for your sin.” Moshe went back up on the 18th of Tammuz and pleaded for mercy on behalf of Israel, as it is written "When I lay prostrate before the LORD those forty days and forty nights, because the LORD was determined to destroy you," (Devarim 9:25) At that moment, the Holy One once again viewed Israel with favor and said to Moshe to carve new tablets and to come up the mountain once again, as it says "Thereupon the LORD said to me, “Carve out two tablets of stone like the first, and come up to Me on the mountain; and make an ark of wood." (Devarim 10:1) He came down on the 28th of Av and carved the second tablets, as it says "So Moses carved two tablets of stone, like the first, and early in the morning he went up on Mount Sinai..." (Shemot 34:4) He went back up on the 29th of Av and the Torah was repeated to him a second time, as it says "I had stayed on the mountain, as I did the first time, forty days and forty nights; and the LORD heeded me once again: the LORD agreed not to destroy you." (Devarim 10:10) 'As I did the first time,' just as the first was a time of favor, so too the second were a time of favor- we can derive from this that those in the middle were a time of anger. He came down on the 10th of Tishre, which was Yom Kippur, and announced to them that they had found favor before God (Hamakom), as it says "Pardon our iniquity and our sin, and take us for Your own!” (Shemot 34:9) Therefore it was established as a fixed day and a remembrance for the generations, as it says "This shall be to you a law for all time: to make atonement for the Israelites for all their sins once a year..." (Vayikra 16:34)

Hew these two tablets of stone (Exod. 34:1). When did Moses descend from the mountain? R. Judah the son of Shalum said: Moses remained on the mountain with the Holy One, blessed be He, for one hundred and twenty days. How did he arrive at this conclusion? From the verse In the third month after the children of Israel were gone out of the land of Egypt (Exod. 19:1). On the sixth day of that month He gave him the Ten Commandments, as it is written concerning him: And Moses went up into the mountain of God (ibid. 24:13). He remained there for forty days, that is, the twenty-four days of the month of Sivan and the sixteen days of the month of Tammuz—totaling forty days in all. He descended from the mountain on the seventeenth day of Tammuz, and on the eighteenth day and nineteenth day he saw the calf, broke the tablets, and halted their revelry. On the twentieth day he turned and ascended once again, as is said: And it came to pass on the morrow that Moses said unto the people: “Ye have sinned a great sin; and now I will go up unto the Lord” (ibid. 32:30). And it is written: And Moses returned unto the Lord and said: “Oh, this people have sinned a great sin” (ibid, v. 31). He remained there the ten days of the month of Tammuz and the entire month of Av, totaling another forty days. He went up on the first day of the month of Elul when He told him: Hew thee these two tablets … and be ready by the morning (ibid. 34:1–2). And he hewed … and Moses rose up early in the morning, and went up unto Mount Sinai (ibid., v. 4). He stayed there throughout the month of Elul and until the tenth day of Tishri (another ten days). On the tenth day of Tishri he descended while the Israelites were praying and fasting. On that day He said to him: I have pardoned according to thy word (Num. 14:20). Then the Holy One, blessed be He, established that day as the day of forgiveness and pardon for the future generations (Yom Kippur), as it is said: For on this day shall atonement be made for you, to cleanse you (Lev. 16:30). Thereupon He commanded Moses: Let them make Me a Sanctuary (Exod. 25:8).