Midrasz do Wyjścia 8:1

(Exod. 27:20:) AND YOU SHALL COMMAND THE CHILDREN OF ISRAEL…. This text is related (to Cant. 1:15): AH, YOU ARE BEAUTIFUL, MY BELOVED…. R. Aqiva said: All of the whole world and its fullness was not as worthy as the day on which the Torah of Song of Songs was given to Israel; for while all of the writings are holy, the Song of Songs is the holiest of the holy.¹Yad. 3:5; Tanh., Exod. 8:1; Cant. R. 1:1:11. R. Eleazar ben Azariah said: To what is the matter comparable? To a king who took a se'ah of wheat and gave it to a baker. He said to him: Take from it so much fine flour, so much crushed grain, so much bran. Similarly all the Writings are holy, but the Song of Songs is the holiest of the holy. Rabbi said: See how the Holy One praises the assembly of Israel in it (i.e., in Cant. 1:15). AH, YOU ARE BEAUTIFUL, MY BELOVED. AH, YOU ARE BEAUTIFUL in works.²Cf. Cant. R. 1:15:1. AH, YOU ARE BEAUTIFUL in the work of your ancestors. AH, YOU ARE BEAUTIFUL in the house. AH, YOU ARE BEAUTIFUL in the field. In the house (according to Deut. 6:9): UPON THE DOORPOSTS OF YOUR HOUSE. In the field through priestly shares, tithes, gleaning the forgotten sheaf (of Deut. 24:19), and through the pe'ah (of Lev. 19:9). (Cant. 1:15:) AH, YOU ARE BEAUTIFUL on the roof (according to Deut. 22:8): YOU SHALL MAKE A PARAPET FOR YOUR ROOF. (Cant. 1:15:) AH, YOU ARE BEAUTIFUL in this world. AH, YOU ARE BEAUTIFUL in the world to come.

HASHEM said to Moses, "Say to Aaron, 'Stretch out your hand . . . " R. Tanchum said, The Holy One Blessed be He said to Moses, "The waters that protected you at the time that you were cast into the [Nile] river should not be smitten by you." AARON STRETCHED OUT HIS HAND . . . Why did [God] bring frogs upon [the Egyptians]? Because they would oppress Israel and say to them, "Bring us abominable creatures and creeping creatures!" Therefore, [God] brought frogs upon them, and at the time that they woudl prepare a cup, it would become filled with frogs. AND THE FROG ASCENDED AND COVERED, ETC. It was taught, R. Akiva said: There was one frog and it produced a swarm of frogs and it filled the land of Egypt (with frogs). R. Elazar ben Azaryah said to [R.Akiva], "Akiva, what so you have to do with Aggadah? Cease your discourses and focus on Negaim and Oholot! (Rather, what happened was that) There was originally one frog and it croaked and they (the others) came. THE NECROMANCERS DID THE SAME THROUGH THEIR INCANTATIONS...the necromancers thought that [the frogs] were the product of demons.

"and Your mighty hand": These are the ten plagues that the Holy One Blessed be He brought upon the Egyptians in Egypt, viz. (Shemoth 8:1) "Stretch forth your hand, etc."