1 Chronicles 6:48

And their brothers the Levites were responsible for all the work of the Tent of the house of God.

Numbers 3:1-4

Now these are the generations of Aaron and Moses, in the day when the word of the Lord came to Moses on Mount Sinai.

Numbers 8:5-26

And the Lord said to Moses,

Numbers 16:9-10

Does it seem only a small thing to you that the God of Israel has made you separate from the rest of Israel, letting you come near himself to do the work of the House of the Lord, and to take your place before the people to do what has to be done for them;

Numbers 18:1-32

And the Lord said to Aaron, You and your sons and your father's family are to be responsible for all wrongdoing in relation to the holy place: and you and your sons are to be responsible for the errors which come about in your work as priests.

1 Chronicles 23:2

And he got together all the chiefs of Israel, with the priests and the Levites.

1 Chronicles 25:1-26

Further, David and the chiefs of the servants of the holy place made selection of certain of the sons of Asaph and of Heman and of Jeduthun for the work of prophets, to make melody with corded instruments and brass; and the number of the men for the work they had to do was:

Treasury of Scripture Knowledge

Summary

Their brethren also the Levites were appointed unto all manner of service of the tabernacle of the house of God.

Bible References

Brethren

1 Chronicles 23:2
And he got together all the chiefs of Israel, with the priests and the Levites.
Numbers 8:5
And the Lord said to Moses,
Numbers 16:9
Does it seem only a small thing to you that the God of Israel has made you separate from the rest of Israel, letting you come near himself to do the work of the House of the Lord, and to take your place before the people to do what has to be done for them;

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain