Kabbalah к Шмот 2:1

Rabbi Itzchak said: In Aharon's and Miriam's case it was not written their parents' marriage, but in Moshe's case it says "and he took a woman of Levi". This is to teach that the Shechinah is called "Levi", and Amram was not deserving of siring Moshe until he touched a piece of the Shechinah, and then he sired Moshe. That is why it is written "and he took a daughter of levi". And this is why it is written "and she saw him, he was good" (Ex. 2:2).