Ezra 6:18

and set the priests in their courses, and the Levites in their offices to minister unto God which is at Jerusalem as it is written in the book of Moses.

Numbers 3:6

"Bring the tribe of Levi, and set them before Aaron the priest, and let them serve him and wait upon him -

1 Chronicles 24:1

The division of the sons of Aaron: Nadab, Abihu, Eleazar and Ithamar.

2 Chronicles 35:4-5

And prepare yourselves by your ancient households and companies, according to the writing of David king of Israel, and the writing of Solomon his son.

Numbers 8:9-26

Then bring the Levites before the tabernacle of witness and gather the whole multitude of the children of Israel together.

1 Chronicles 23:1-26

And when David was old and stricken in years, 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 the tribe of Levi, and set them before Aaron the priest, and let them serve him and wait upon him -
Numbers 8:9
Then bring the Levites before the tabernacle of witness and gather the whole multitude of the children of Israel together.