מדרש אויף שמות 28:30

“The wrath of the Lord was enflamed against Moses, and He said: Surely Aaron your brother the Levite, I know that he can speak. And behold, he is coming out to meet you, and he will see you, and be glad in his heart” (Exodus 4:14).
What enflamed wrath was there? [At that moment,] the priesthood was taken from Moses and given to Aaron. Our Rabbis of blessed memory say: “Surely Aaron your brother the Levite” – from the fact that He said “your brother,” don’t I know that he is a Levite? Rather, He said to him: ‘You were fit to be a priest, and he, a Levite. Because you refuse to fulfill My words, you will be a Levite, and he, a priest.’
“I know that he can speak.” Because you said: “I am not a man of words,” therefore, he will speak. And that which you thought that he would be upset, that is not so; rather, he will be glad, as it is stated: “He will see you, and be glad in his heart.” Rabbi Shimon ben Rabbi Yosei said: The heart that was glad over the greatness of his brother will don the Urim ve’Tumim,³⁷Part of the priestly vestments used as an oracle. as it is stated: “They shall be upon Aaron’s heart” (Exodus 28:30).
“You shall speak to him and place the words in his mouth, and I will be with your mouth and with his mouth, and I will instruct you what you shall do. He shall speak for you to the people and he shall be a mouth for you, and you shall be in God’s stead for him” (Exodus 4:15–16).
When you fear to speak all these matters, “I will be with your mouth.” “He shall speak for you to the people and he shall be a mouth for you” – a spokesperson. “And you shall be in God’s stead for him.” Even though he is your older brother, fear of you will be upon him. From here they said: Fear of your teacher is like the fear of Heaven. He [God] said to him: ‘Just as fear of Me is upon you, so, too, fear of you is upon him.’
“You shall take in your hand this staff, with which you shall perform the signs” (Exodus 4:17).
“You shall take in your hand this staff.” You said: “I am not a man of words” (Exodus 4:10). “A slave will not be admonished with words” (Proverbs 29:19). What does one do to a slave? One afflicts him with a staff. So should you take the staff with which to afflict him; that is what is written: “You shall take in your hand this staff, with which you will perform the signs.”

Another matter: “Behind your braid your hair is like a flock of goats that streams down [shegaleshu] from Mount Gilad” (Song of Songs 4:1) – the mountain from whose midst you took away [shegelashtem], I rendered a memorial for the nations of the world. Which is this? This is the Temple, as it is stated: “You are awesome, God, from Your Temple” (Psalms 68:36). From where does awe emerge? Is it not from the Temple? This is what it says: “You shall observe My Sabbaths and you shall revere My Sanctuary” (Leviticus 26:2) – as it is sanctified in its destruction just as it was sanctified while it was built. The matters can be inferred a fortiori: If to His Temple the Holy One blessed be He did not show favor, when He will come to exact punishment upon its destroyers all the more so.
What is it that you took away from its midst? “Your teeth are like a flock of ordered ewes” (Song of Songs 4:2) – defined matters, these are the vestments of the High Priesthood, as we learned there:⁴¹Yoma 71b The High Priest serves in eight vestments and the common [priest] in four: tunic, trousers, mitre, and sash. The High Priest adds beyond these the breastplate, ephod, robe, and the sacred frontplate.
The tunic would atone for murderers, just as it states: “They dipped the tunic in blood” (Genesis 37:31); some say for those who don garments of diverse kinds, just as it states: “He made for him a fine tunic” (Genesis 37:3).⁴²This verse refers to the tunic that Jacob made for Joseph. According to one opinion, it contained wool and linen (see Bereshit Rabba 84:8). At the very least, its stripes could be reminiscent of different types of materials. The midrash takes this as an allusion to the fact that the tunic of the High Priest atones for the transgression of diverse kinds. The trousers atone for forbidden sexual relations, just as it states: “Make them linen trousers to cover the flesh of their nakedness” (Exodus 28:42). The mitre atones for the haughty, just as you say: “You shall place the mitre on his head” (Exodus 29:6). For what did the sash atone? For those with criminal thoughts.⁴³Apparently text should be added here such that this sentence reads: For thieves, and some say for criminal thoughts (see Vayikra Rabba 10:6). The reason for the one who says for the thieves, it is because it was hollow, corresponding to thieves who perform their actions clandestinely.⁴⁴There was space inside the sash, like a secret hiding place. According to the one who says it was for criminal thoughts, Rabbi Levi said: It was thirty-two cubits long, and he would twist it to this side and that.⁴⁵He would wrap it all the way around himself multiple times, representing the twisted thoughts of those with criminal and dishonest intent. The breastplate would atone for those who distort justice, just as it says: “You shall place in the breastplate of judgment” (Exodus 28:30). The ephod would atone for idol worshippers, just as it says: “No ephod and no terafim” (Hosea 3:4).⁴⁶Terafim are household idols. The robe would atone for evil speech. Rabbi Simon [said] in the name of Rabbi Yonatan of Beit Guvrin: There are two items for which there was no atonement⁴⁷No offering designated to atone for it. but the Torah designated atonement for them, and these are: Evil speech and one who murders unwittingly. There was no atonement for evil speech, but the Torah designated atonement for it: the bell of the robe, as it is stated: “It shall be upon Aaron to serve, and its sound shall be heard…” (Exodus 28:35). Let the sound come and atone for the sound of evil speech. There was no atonement for one who murders unwittingly, but the Torah designated atonement for it, this is the death of the High Priest, as it stated: “He shall dwell in it until the death of the High Priest” (Numbers 35:25). The frontplate would atone for the impudent, and there is one who says for the blasphemers. The one who says for the impudent, just as it says: “On Aaron’s forehead [metzaḥ]” (Exodus 28:38), and below it says: “Yet you had the impudence [metzaḥ] of a harlot…” (Jeremiah 3:3). According to the one who says for the blasphemers, “it shall be on his forehead always” (Exodus 28:38), and below it says: “the stone penetrated his forehead” (I Samuel 17:49).⁴⁸The stone shot by David penetrated the forehead of Goliath, who had blasphemed God.
It is written: “He fell on his face to the ground” (I Samuel 17:49). Why is it that “he fell on his face”?⁴⁹The force of the stone to his forehead should have caused him to fall backward. Rather, initially you learn: “His height was six cubits and one span” (I Samuel 17:4) – so that this righteous one will not be inconvenienced to walk his entire height, therefore, it is written: “He fell on his face to the ground.”⁵⁰Divine providence had Goliath fall forward so that David would not have to walk too far in order to cut off his head. Rabbi Huna said: It is because Dagon his god was engraved on his heart, to fulfill what is stated: “I will cast your carcasses upon the carcasses of your idols” (Leviticus 26:30).
Another matter: “He fell on his face to the ground” (I Samuel 17:49) – Rabbi said: So that the disgusting mouth that cursed and blasphemed would be hidden [in the ground], like that which is stated: “Hide them in the dust together” (Job 40:13). Alternatively, “he fell on his face to the ground” – so that this righteous one would not have a troubled mind.⁵¹He would be certain that Goliath no longer posed a danger even though he was not yet dead. Alternatively, “he fell on his face” – so that this righteous one would come and step on [the back of] his neck, to fulfill what is stated: “You will trample their high places” (Deuteronomy 33:29).
“That have come up from bathing” (Song of Songs 4:2) – they atone for Israel. “That are all paired” (Song of Songs 4:2) – these are the two braided chains of gold that emerge from the midst of the breastplate and appeared from its midst like two tassels. “And there is none missing among them” (Song of Songs 4:2) – that not one of them was tattered. “Your lips are like a scarlet thread” (Song of Songs 4:3) – this is the sacred crown.⁵²This is a reference to the blue threads that passed over the head of the High Priest and fastened the frontlet to his forehead. “Your speech is lovely” (Song of Songs 4:3) – this is the frontplate.
Rabbi Yonatan was ascending to pray in Jerusalem. When he reached a certain Pelatinus,⁵³This is a reference to Mount Gerizim, which the Cuthites and Samaritans considered sacred. a certain Cuthite encountered him. He said to [Rabbi Yonatan]: ‘Where are you going?’ [Rabbi Yonatan]said to him: ‘To pray in Jerusalem.’ He said to [Rabbi Yonatan]: ‘Would it not be preferable for you to ascend and pray on this blessed mountain and not pray in those ruins [in Jerusalem]?’ [Rabbi Yonatan] said to him: ‘Why is this mountain blessed?’ He said to [Rabbi Yonatan]: ‘Because it was not flooded with the Flood waters.’ That is what people say: The Land of Israel was not flooded with the Flood waters. An answer slipped the mind of Rabbi Yonatan at that moment and he did not respond to him. His donkey driver said to him: ‘Rabbi, allow me, and I will respond to him.’ He said to him: ‘Respond to him.’ He said to that Cuthite: ‘This mountain, what do you consider it? If it is one of the high mountains, is it not written: “All the high mountains were covered” (Genesis 7:19)? If it is one of the low mountains, it is written: “Fifteen cubits upward the waters intensified, and the mountains were covered” (Genesis 7:20). The verse did not address the low mountains. If regarding the high mountains it is written: “All the mountains were covered,” all the more so regarding the low ones.’ At that moment the Cuthite fell silent and was unable to find a response. At that moment, Rabbi Yonatan dismounted and drove his donkey driver three mil, and he read in his regard three verses: “You will be the most blessed of all the peoples; there will be no male or female infertile among you or among your animals” (Deuteronomy 7:14), even among those of you who work with animals; and this: “Any weapon crafted against you will not succeed…” (Isaiah 54:17); and this: “your temple is like a pomegranate slice [rakatekh]” (Song of Songs 4:3) – even the empty [reikan] among Israel is packed with answers like a pomegranate. “Behind your braid [letzamatekh]” – and it goes without saying regarding the modest and the fervent [metzumatin] among you.

“Your cheeks are lovely with ornaments, your neck with beads” (Song of Songs 1:10).
“Your cheeks are lovely”—just as these cheeks were created only for speech, so too, Moses and Aaron were created only for speech; “with ornaments [batorim],” with two Torahs, written and oral.
Another matter, batorim, many Torahs; that is what is written: “This is the law [tora] of the burnt offering” (Leviticus 6:2); “this is the law [tora] of the meal offering” (Leviticus 6:7); “this is the law [tora] of the guilt offering” (Leviticus 7:1); “this is the law [tora] of the peace offering” (Leviticus 7:11). “This is the law [tora] of a person when he dies in a tent” (Numbers 19:14).
Another matter, batorim, with two countenances [te’arim], with two brothers, these are Moses and Aaron, whose countenances were favorable to each other. This one rejoiced over the prominence of the other and that one rejoiced over the prominence of the other. Rabbi Pinḥas said: It is written: “He will speak to the people on your behalf, and he will be a mouth for you, and you will be an elohim for him” (Exodus 4:16). [“He will be a mouth for you,”] a disseminator. “And you will be an elohim for him,” did Moses become a god for Aaron that you say: “And you will be an elohim for him”? Rather, this is what the Holy One blessed be He said to Moses: ‘Moses, just as fear of Me is upon you, so too, your fear will be upon your brother.’ But he did not do so. Rather, “Moses and Aaron went and they assembled all the elders of the children of Israel; Aaron spoke all the matters” (Exodus 4:29–30). [Moses] equated his shoulder to [Aaon’s] shoulder,²⁵²They stood shoulder to shoulder and treated each other as equals. Thus, Moses did not send Aaron to do his bidding; they worked together. as this one still rejoiced over the prominence of the other, and that one over the prominence of the other.
From where [is it derived] that Aaron rejoiced over Moses’s prominence? As it is stated: “He will see you and he will rejoice in his heart” (Exodus 4:14). Rabbi Shimon ben Yoḥai taught: The heart that rejoiced over the prominence of Moses his brother will don the Urim and the Tumim. That is what is written: “You shall place the Urim and the Tumim in the breastplate of judgment and they shall be upon Aaron’s heart” (Exodus 28:30).
From where [is it derived] that Moses rejoiced over Aaron’s prominence? As it is stated: “It is like fine oil on the head, descending onto the beard, the beard of Aaron” (Psalms 133:2). Rabbi Aḥa said: Did Aaron have two beards, as it is written: “Descending onto the beard, the beard of Aaron”?²⁵³Why does it say the word beard twice? Rather, when Moses saw the anointing oil descending onto the beard of Aaron, it was comparable for him as though it descended onto the beard of Moses, and he rejoiced; therefore, it is stated: “Onto the beard, the beard of Aaron.”