וַיִּקַּ֨ח עַמְרָ֜ם אֶת־יוֹכֶ֤בֶד דֹּֽדָתוֹ֙ ל֣וֹ לְאִשָּׁ֔ה וַתֵּ֣לֶד ל֔וֹ אֶֽת־אַהֲרֹ֖ן וְאֶת־מֹשֶׁ֑ה וּשְׁנֵי֙ חַיֵּ֣י עַמְרָ֔ם שֶׁ֧בַע וּשְׁלֹשִׁ֛ים וּמְאַ֖ת שָׁנָֽה׃
Amram mengambil Yokhebed, bibinya, menjadi istrinya, dan perempuan itu melahirkan baginya Harun dan Musa. Umur Amram seratus tiga puluh tujuh tahun.
Rashi
יוכבד דדתו JOCHEBED HIS AUNT — The Targum has: his father’s sister; she was daughter of Levi (cf. Exodus 2:1) and sister of Kohath.
Chizkuni
ויקח עמרם את יוכבד דודתו “Amram married his aunt Yocheved;”The only reason that seems feasible in understanding why G-d agreed to such great people as Moses and his siblings to be born from a union that the Torah would forbid once it was revealed at Mount Sinai, is the rule that we do not appoint a person to the highest position in the land unless the people were aware of at least something inappropriate that such a person had been guilty of actively or passively before his appointment. [This rule, if enforced, will diminish the chances of such high ranking people allowing their high office to develop feelings of superiority to those around him. Ed.] The best known example of the rule is King David, one of whose ancestors was Ruth, the Moabite, a people with whom intermarriage is strictly prohibited by the Torah. [He was reminded of this repeatedly during his life, not only his fitness as king being questioned, but even his claim to be Jewish. Compare Rashi on Yuma 22. Ed.]
Da'at Zekenim
ויקח עמרם את יכבד דדתו לו לאשה, “Amram took his aunt Yocheved to be his wife;” I have seen a Midrash where it is explained that the reason why when the Torah lists the penalties for incestuous relationships, (Leviticus chapter 20,10-21) but fails to list the karet penalty for marrying one’s aunt, is because Moses was born out of a relationship which the Torah would forbid later on.