Reference

Numbers 3:6

Bring the tribe of Levi near, and present them before Aaron the priest, that they may minister unto him.
4

And Nadab and Abihu died before the Lord, when they offered strange fire before the Lord, in the wilderness of Sinai, and they had no children: and Eleazar and Ithamar ministered in the priest’s office in the sight of Aaron their father.

5

And the Lord spake unto Moses, saying,

6

Bring the tribe of Levi near, and present them before Aaron the priest, that they may minister unto him.

7

And they shall keep his charge, and the charge of the whole congregation before the tabernacle of the congregation, to do the service of the tabernacle.

8

And they shall keep all the instruments of the tabernacle of the congregation, and the charge of the children of Israel, to do the service of the tabernacle.