1 Chronicles 6:48

Their kinsmen the Levites were appointed for all the service of the tabernacle of the house of God.

Numbers 3:1-4

Now these are the records of the generations of Aaron and Moses at the time when the Lord spoke with Moses on Mount Sinai.

Numbers 8:5-26

Again the Lord spoke to Moses, saying,

Numbers 16:9-10

is it not enough for you that the God of Israel has separated you from the rest of the congregation of Israel, to bring you near to Himself, to do the service of the tabernacle of the Lord, and to stand before the congregation to minister to them;

Numbers 18:1-32

So the Lord said to Aaron, “You and your sons and your father’s household with you shall bear the guilt in connection with the sanctuary, and you and your sons with you shall bear the guilt in connection with your priesthood.

1 Chronicles 23:2

And he gathered together all the leaders of Israel with the priests and the Levites.

1 Chronicles 25:1-26

Moreover, David and the commanders of the army set apart for the service some of the sons of Asaph and of Heman and of Jeduthun, who were to prophesy with lyres, harps and cymbals; and the number of those who performed their service 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 gathered together all the leaders of Israel with the priests and the Levites.
Numbers 8:5
Again the Lord spoke to Moses, saying,
Numbers 16:9
is it not enough for you that the God of Israel has separated you from the rest of the congregation of Israel, to bring you near to Himself, to do the service of the tabernacle of the Lord, and to stand before the congregation to minister to them;