1 Chronicles 15:4
And David gathered together the sons of Aaron and the Levites:
Exodus 6:16-22
These are the names of the sons of Levi according to their generations: Gershon, Kohath, and Merari, the years of the life of Levi being 137 years.
Numbers 3:4
But Nadab and Abihu died before the LORD when they offered unauthorized fire before the LORD in the wilderness of Sinai, and they had no children. So Eleazar and Ithamar served as priests in the lifetime of Aaron their father.
1 Chronicles 6:16-30
The sons of Levi: Gershom, Kohath, and Merari.
1 Chronicles 6:49-50
But Aaron and his sons made offerings on the altar of burnt offering and on the altar of incense for all the work of the Most Holy Place, and to make atonement for Israel, according to all that Moses the servant of God had commanded.
1 Chronicles 12:26-28
Of the Levites 4,600.