Midrash su Genesi 41:45

Rabbi Eliezer said: Leah bare her sons after seven months, and in seven years there were born unto Jacob eleven sons and one daughter. And all of them were born, each with his partner with him, except Joseph, whose partner was not born with him, for Asenath, the daughter of Dinah, was destined to be his wife, and (also) except Dinah, whose partner was not born with her. She said: This child is (according to) justice and judgment, therefore she called her name Dinah.

What did (Jacob) do? He wrote the Holy Name upon a golden plate, and suspended it about her neck and sent her away. She went her way. Everything is revealed before the Holy One, blessed be He, and Michael the angel descended and took her, and brought her down to Egypt to the house of Potiphera; because Asenath was destined to become the wife of Joseph. Now the wife of Potiphera was barren, and (Asenath) grew up with her as a daughter. When Joseph came down to Egypt he married her, as it is said, "And he gave him to wife Asenath the daughter of Potiphera priest of On" (Gen. 41:45).

AND HE LEFT ALL THAT HE HAD IN JOSEPH'S HAND; AND, HAVING HIM, HE KNEW NOT AUGHT SAVE THE BREAD THAT HE DID EAT (XXXIX, 6). This is a euphemism. [It refers to his wife.]