Midrash for Nehemiah 2:2

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).