Exodus 6:20

And a man from the house of Levi went and took a daughter of Levi as a wife.

Now these are the generations of Aaron and Moses at the time when Yahweh spoke with Moses on Mount Sinai.

These then are the sons of Levi by their names: Gershon and Kohath and Merari.

These are the families of Levi: the family of the Libnites, the family of the Hebronites, the family of the Mahlites, the family of the Mushites, the family of the Korahites. Kohath became the father of Amram.

And the name of Amram’s wife was Jochebed, the daughter of Levi, who was born to Levi in Egypt; and she bore to Amram: Aaron and Moses and their sister Miriam.

The sons of Levi were Gershon, Kohath, and Merari.

The sons of Amram were Aaron and Moses. And Aaron was separated in order to sanctify him as most holy, he and his sons forever, to offer offerings up in smoke before Yahweh, to minister to Him and to bless in His name forever.