Ezra 6:18
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.
Numbers 3:6
"Bring the tribe of Levi near, and set them before Aaron the priest, that they may minister to him.
1 Chronicles 24:1
These were the divisions of the sons of Aaron. The sons of Aaron: Nadab and Abihu, Eleazar and Ithamar.
2 Chronicles 35:4-5
Prepare yourselves after your fathers' houses by your divisions, according to the writing of David king of Israel, and according to the writing of Solomon his son.
Numbers 8:9-26
You shall present the Levites before the Tent of Meeting. You shall assemble the whole congregation of the children of Israel.
1 Chronicles 23:1-26
Now David was old and full of days; and he made Solomon his son king over Israel.