Midrash for Exodus 34:29

Raba b. Mechasia in the name of R. Chama b. Guria who spoke in the name of Rab said: "He who bestows a gift on his friend should let him know it; for it is said (Ex. 31, 13.) That ye may know that I am the Lord who doth sanctify you." We have also a Baraitha to the same effect: That ye may know that I am the Lord who doth sanctify you, i.e.. The Holy One, praised be He! said unto Moses "I have a good gift in my treasury; its name is Sabbath; this I wish to bestow on Israel; go, and announce it to them." "We learn from this then," said Rabban Simon b. Gamaliel, "that if one give a piece of bread to a child he ought to make it known to the child's mother." What shall one do [to inform the mother]? Abaye said: "He should put some oil around the child's eye or stain it with some dye" [so that his mother will ask him concerning it, and he will then tell her he also gave him bread]. Nowadays, however, when such is the apprehension of performing an act of witchcraft, what shall one do? R. Papa said: "He should put some of this very thing he gave to the child around his eyes." Is it so? [that a gift should first be told of]; has not R. Chama b. Chanina said: "He who bestows a gift on his friend should not let him know of it, for it is said (Ex. 34, 29.) And Moses did not know that the skin of his face shone, because He had spoken with him." This is not difficult to explain. The latter instance speaks of a thing that may become known by itself, but the former speaks of a thing that cannot become known by itself. Is not the Sabbath a thing that was to be known [and yet God informed Israel of it]? But the reward [for observing it] cannot be known.

R. Chama b. Chanina said: "He who bestows a gift on his friend need not inform him about it, as it is said (Ex. 34, 29) And Moses did not know that the skin of his face."

“He severed in his enflamed wrath all the horn of Israel; He retracted His right hand from before the enemy. He burned in Jacob like flaming fire, consuming all around” (Lamentations 2:3).
“He severed in his enflamed wrath all the horn of Israel.” There are ten horns: the horn of Abraham, the horn of Isaac, the horn of Joseph, the horn of Moses, the horn of Torah, the horn of priesthood, the horn of Levites, the horn of prophecy, the horn of the Temple, the horn of Israel, and some say, the horn of the Messiah.
The horn [keren] of Abraham, as it is stated: “My beloved had a vineyard in a fruitful corner [keren]” (Isaiah 5:1).⁷⁷The Sages identify the term “beloved” in the verse as referring to Abraham. See, similarly, Eikha Rabba Prologue 24; Eikha Rabba 1:1. The horn of Isaac, as it is stated: “Caught in the thicket by its horns” (Genesis 22:13). The horn of Joseph, as it is stated: “His horns are the horns of aurochs” (Deuteronomy 33:17). The horn of Moses, as it is written: “The skin of his face was radiant [karan]” (Exodus 34:29). The horn of Torah, as it is written: “Rays [karnayim] from His hand to him” (Habakkuk 3:4). The horn of priesthood, as it is written: “His horn is raised high in honor” (Psalms 112:9).⁷⁸This verse refers to honor [kavod], a term used particularly in regard to priests; see, e.g., Exodus 28:2, 40 (Maharzu). The horn of the Levites, as it is stated: “All of these were sons of Heiman, the king's seer in matters of God, to raise the horn” (I Chronicles 25:5).⁷⁹The reference is to a family of Levites. The horn of prophecy, as it is written: “My horn is exalted in the Lord” (I Samuel 2:1). The horn of the Temple, as it is written: “From the horns of the aurochs; answer me (Psalms 22:22).⁸⁰The midrash elsewhere (Midrash Tehillim 102) relates that David prayed to God that He save him from an auroch, and promised to build the Temple in return (Maharzu). The horn of Israel, as it is stated: “He raised a horn for His people” (Psalms 148:14). And some say the horn of the Messiah, as it is stated: “Exalt the horn of His anointed one” (I Samuel 2:10).⁸¹The word Messiah [mashiaḥ] literally means “anointed one.”
All of them were placed on the heads of the Israelites, and when they sinned they were taken from them. That is what is written: “He severed in His enflamed wrath all the horn of Israel.” They were given to the nations of the world. That is what is written: “Concerning the ten horns that were on its head, and the other that arose, and before which three fell” (Daniel 7:20), and it is written thereafter: “And the ten horns: From this kingdom, ten kings will arise, and another will arise after them, and he will be different from the earlier ones, and he will subdue three kings” (Daniel 7:24). When Israel repents, the Holy One blessed be He will restore them to their place. That is what is written: “All the horns of the wicked I will sever, while the horns of the righteous shall be raised” (Psalms 75:11). The horns that the Righteous One of the world severed, when will He restore them to their place? When the Holy One blessed be He exalts the horn of His anointed one, as it is written: “He will give strength to His king and exalt the glory of His anointed one” (I Samuel 2:10).
“He retracted His right hand from before the enemy.” Rabbi Azarya said in the name of Rabbi Yehuda ben Rabbi Simon: When iniquities were the cause and the enemies entered Jerusalem, they took the mighty of Israel and bound their hands behind them. The Holy One blessed be He said: ‘I wrote in the Torah: “I will be with him in distress” (Psalms 91:15), and now My children are wallowing in distress and I am in comfort?’ As it were, “He retracted His right hand.”⁸²The Hebrew phrase in the verse, usually translated “He retracted His right hand,” can also be translated “He put His right hand behind Him.” God does not respond to the atrocities and indignities committed by the enemy to His people, as though His hands are tied behind His back.
Ultimately He revealed it to Daniel. That is what is written: “But you, go to the end” (Daniel 12:13). [Daniel] said to Him: ‘To give an accounting?’ The Holy One blessed be He said to him: “And rest” (Daniel 12:13). He said to Him: ‘Will I rest forever?’ He said to him: “You will stand” (Daniel 12:13). He said to Him: ‘With whom, with the righteous or with the wicked?’ He said: “To your fate” (Daniel 12:13), with the righteous. He said to Him: ‘“At the end of days [hayamim]” (Daniel 12:13),⁸³This is when all the dead, righteous and wicked, will arise for judgment. or at the end of the right hand [hayamin]?’⁸⁴This is when God will reveal His right hand and bring salvation to the righteous. He said to him: ‘To the end of the right hand; that right hand that is subjugated. I put an end to My right hand.⁸⁵I put an end to the restrictions on My right hand. When I redeem My children, I will have redeemed My right hand.’ That is what David said: “So that Your beloved ones be saved, deliver Your right hand and answer me” (Psalms 60:7).