Midrasz do Rodzaju 34:30

A company of priests alludes to the sons of Jacob, who had been called a kingdom of priests. Why does Scripture say: They murder in the way to Shechem? Because they committed an immoral act. Upon their return, Jacob began to chastise Simeon and Levi, saying: Ye have troubled me, to make me odious (Gen. 34:30). The Holy One, blessed be He, said to him: Be not afraid, no one can harm you, as it is said: And a terror of God was upon the cities (ibid. 35:5).

and Potiphar said unto them: Name the value of that youth. And they said: We want for him ‎four hundred pieces of silver. And Potiphar said unto them: I am ready to pay you the amount ‎if you will bring unto me him that hath sold the youth unto you and inform me concerning his ‎affairs; peradventure he hath been stolen, for the youth is neither a slave nor the son of a ‎slave, for I see noble blood within him. And the Midianites went away and they brought the ‎Ishmaelites who had sold Joseph unto them, and the Ishmaelites said unto Potiphar: He is a ‎slave, and we have sold him unto these men. And when Potiphar heard their words he paid ‎the silver unto the Midianites and they went away and the Ishmaelites returned likewise to ‎their place. And Potiphar took Joseph and he brought him into his house and he served ‎Potiphar. And Joseph found grace in Potiphar’s eyes, and he trusted in him, and he made him ‎overseer in his house and all that he had Potiphar surrendered into his care. And the Lord was ‎with Joseph and he was a prosperous man and the Lord blessed the house of Potiphar for ‎Joseph’s sake, and he left all that he had in Joseph’s hand. And Joseph was all-in-all, and upon ‎his command everything was done in Potiphar’s house. And Joseph was eighteen years of age, ‎a youth of beautiful eyes and pleasant appearance, and there was not his like in the whole ‎land of Egypt. At that time when Joseph was in his master's house, coming in and going out ‎and attending to his master's affairs, Zulycah, his master's wife, lifted up her eyes unto Joseph, ‎and she beheld his comely appearance, and his beauty tempted her heart. And her soul ‎became attached unto Joseph, and she beguiled him and persuaded him day after day, but he ‎would not lift up his eyes to look at his master's wife. And Zulycah said unto him: How comely ‎is thy appearance and how graceful thy figure. Verily I have looked at all the servants, but I ‎could not find one as fair as thou art. And Joseph replied unto her: He who hath created me ‎hath created likewise all the sons of man. And she said unto him: How beautiful are those eyes ‎of thine and thou hast captivated with them all the inhabitants of Egypt, men and women ‎alike. And he said unto her: Verily they are beautiful while alive, but if thou wert to see them ‎in the grave thou wouldst tremble before them. And she continued: How pleasant and sweet ‎are thy words, do take the harp which is in the house and play with thy hands and let us hear ‎thy voice. And Joseph said: How pleasant and sweet are my words when I sing the praises and ‎the glory of my Lord.‎

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).