Midrash su Isaia 19:22

“Your two breasts are like two fawns, twins of a gazelle, that graze among the lilies” (Song of Songs 4:5).
“Your two breasts” – these are Moses and Aaron. Just as the breasts are the splendor and the glory of a woman, so too, Moses and Aaron are the splendor and the glory of Israel. Just as the breasts are the beauty of the woman, so too, Moses and Aaron are the beauty of Israel. Just as the breasts are the honor and praise of a woman, so too, Moses and Aaron are the honor and the praise of Israel. Just as the breasts are filled with milk, so too, Moses and Aaron fill Israel with Torah. Just as the breasts, everything that the woman eats, the baby eats and suckles from them, so too, all the Torah that Moses our master studied, he taught to Aaron; that is what is written: “Moses told Aaron all the words of the Lord” (Exodus 4:28). The Rabbis say: He revealed to him the ineffable name. Just as the breasts, one of them is not larger than the other, so it was with Moses and Aaron. That is what is written: “That Moses and Aaron” (Exodus 6:27), and it is written: “That Aaron and Moses” (Exodus 6:26). Moses was not greater than Aaron, and Aaron was not greater than Moses in Torah.
Rabbi Abba said: [This is analogous] to a king who had two fine pearls, and he placed them on the pans of a balance scale; this one was not greater than that one and that one was not greater than this one. So too, Moses and Aaron were equal. Rabbi Ḥanina bar Pappa said: Blessed is the Omnipresent who selected these two brothers, who were created only for the Torah and for the glory of Israel. Rabbi Yehoshua of Sikhnin said in the name of Rabbi Levi: There were two families of priests in Alexandria; the body temperature of one was cold and [that] of the other one’s was hot. There was an incident where doctors sent for some of them and they prepared a suspension from them with which they would heal.⁷⁹They took tissue from bodies in each family, and the combination was just right and could be used as a healing ointment. So too, Moses and Aaron complemented each other in leading Israel.
Rava in the name of Rabbi Shimon: Flesh and blood does not prepare a dressing until he sees the wound; however, He who spoke and the world came into being is not so, but rather He prepares the dressing and then strikes. That is what is written: “Behold I am bringing it a remedy and a cure, and I will heal them…” (Jeremiah 33:6),⁸⁰He prepared the cure for Jerusalem before He struck it. and it is written: “When I will heal Israel” (Hosea 7:1). The Holy One blessed be He said: I came to heal the iniquities of Israel, “and the iniquity of Ephraim and the evils of Samaria will be revealed” (Hosea 7:1).⁸¹Only after preparing the cure will they be taken to task for their wickedness. However, the nations of the world, He strikes them and only then heals them, as it is stated: “The Lord will strike Egypt, striking and healing” (Isaiah 19:22). Striking by means of Aaron and healing by means of Moses. Blessed are these two brothers who were created only for the glory of Israel. That is what the prophet Samuel said: “The Lord who produced Moses and Aaron” (I Samuel 12:6). That is “your two breasts” – these are Moses and Aaron.