1 Chronicles 15:4
And David assembled the sons of Aaron and the Levites:
Exodus 6:16-22
And these are the names of the sons of Levi according to their lineages: Gershon, Kohath, and Merari. And the years of the life of Levi were one hundred thirty-seven years.
Numbers 3:4
But Nadab and Abihu died before the LORD, when they offered strange fire before the LORD, in the wilderness of Sinai, and they had no sons; and Eleazar and Ithamar exercised the priesthood in the sight of Aaron, their father.
1 Chronicles 6:16-30
The sons of Levi: Gershon, Kohath, and Merari.
1 Chronicles 6:49-50
But Aaron and his sons made incense upon the altar of the burnt offering and on the altar of incense, in all the work of the holy of holies, and to make reconciliation for Israel, according to all that Moses, the slave of God, had commanded.
1 Chronicles 12:26-28
Of the sons of Levi four thousand six hundred.