Musar su Genesi 39:7

(Bereshith 39:6): "And Joseph was beautiful in from and in appearance": As Rashi explains it, once he saw himself elevated, he began preening his hair, at which the Holy One Blessed be He said to him: "Your father is in mourning and you preen your hair! I will incite the 'bear' against you," whereupon (Ibid. 7): "And it was, after these things, that the wife of his master, etc." and Heaven contrived to have him placed in the prison house.