Ezra 6:18

And they set up the priests in their divisions, and the Levites in their courses, over the service of God, which was in Jerusalem, - as it is written, in the Book of Moses.

Numbers 3:6

Bring near the tribe of Levi, and thou shalt cause it to stand before Aaron the priest, - so shall they wait upon him;

1 Chronicles 24:1

Now, the sons of Aaron, had their courses, - the sons of Aaron, Nadab and Abihu, Eleazar and Ithamar;

2 Chronicles 35:4-5

and prepare yourselves by your ancestral houses, according to your courses, - by the writing of David king of Israel, and by what hath been written by Solomon his son;

Numbers 8:9-26

Then shalt thou bring the Levites near, before the tent of meeting, - and shalt call together all the assembly of the sons of Israel;

1 Chronicles 23:1-26

Now, David, was old, and satisfied with days, - so he made Solomon his son king, over Israel;

Treasury of Scripture Knowledge

Summary

And they set the priests in their divisions, and the Levites in their courses, for the service of God, which is at Jerusalem; as it is written in the book of Moses.

As it is written

Bible References

As it is written

Numbers 3:6
Bring near the tribe of Levi, and thou shalt cause it to stand before Aaron the priest, - so shall they wait upon him;
Numbers 8:9
Then shalt thou bring the Levites near, before the tent of meeting, - and shalt call together all the assembly of the sons of Israel;