Exodus 6:16-20

And these are the names of the sons of Levi according to their generations: Gershon, and Kohath, and Merari; and the years of the life of Levi were a hundred thirty and seven years. The sons of Gershon: Libni and Shimei, according to their families. And the sons of Kohath: Amram, and Izhar, and Hebron, and Uzziel; and the years of the life of Kohath were a hundred thirty and three years. And the sons of Merari: Mahli and Mushi. These are the families of the Levites according to their generations. And Amram took him Jochebed his father’s sister to wife; and she bare him Aaron and Moses: and the years of the life of Amram were a hundred and thirty and seven years.