Midrash su Genesi 34:31

And Dinah, the daughter of Jacob, heard all these words which Hidekem and his brothers had ‎spoken, as also the answer of Hamor and his son, Shechem, and all the people of their city. ‎And Dinah sent hastily one of her maidens, which her father had sent to take care of her in the ‎house of Shechem, to Jacob and his sons. And the maid servant went and spoke all their words ‎to: Jacob and his sons, saying: Such was Hidekem's advice, and such the answer of Hamor, and ‎Shechem, and the people of their city. And when Jacob and his sons heard these words they ‎became filled with wrath, and they were furious and their anger burnt within them. And ‎Simeon and Levi said: As the Lord liveth there will not be left of them to-morrow a remnant. ‎And twenty young men had also concealed themselves and they were not circumcised, and ‎these young men fought against Simeon and Levi, and Simeon and Levi killed eighteen of ‎them. And two of them fled and escaped into the slime pits that were in the city, and Simeon ‎and Levi searched for them but they could not find them. And Simeon and Levi went further ‎into the city and they killed all the people of the city at the edge of the sword, and there was ‎not left a remnant. And there was a great tumult in the city, and the cry of the people of the ‎city ascended to the very heavens, and the women and children cried terribly. And Simeon ‎and Levi smote the whole city, they left not one male person in the entire city. And Hamor and ‎his son, Shechem, they slew, also, at the edge of the sword, and then they led away Dinah ‎from the house of Shechem, and went away. And then the sons of Jacob returned among the ‎slain and took all the spoil that was found in the city and in the field. And while they were ‎engaged in taking the spoil, some three hundred women stood up throwing dust at them and ‎pelting them with stones, and Simeon turned at them and slew them all with his sword. And ‎Simeon returned unto Levi, and they came into the city and they took also their sheep and ‎oxen and all the cattle and the rest of the women and children, and they opened the gates ‎and went out and came to their father in triumph.‎

Simeon and Levi were moved by a great zeal on account of the immorality, as it is said, "And they said, Should he deal with our sister as with an harlot?" (Gen. 34:31). And each man took his sword and slew all the men of Shechem. When Jacob heard thereof, he became sorely afraid. For he said: Now all the people of the land will hear, and they will gather together against me || and smite me. He began to curse the wrath of his sons, as it is said, "Cursed be their anger, for it is fierce" (Gen. 49:7); and he also cursed their sword in the Greek language, for he said: "Weapons of violence are their swords" (Gen. 49:5). All the kings of the earth heard (thereof) and feared very much, saying: If two sons of Jacob have done all these great things, if they all band themselves together, they will be able to destroy the world. And the dread of the Holy One, blessed be He, fell upon them, as it is said, "And the terror of God was upon the cities,… and they did not pursue after the sons of Jacob" (Gen. 35:5).