Ezra 6:18
They appointed the priests by their divisions and the Levites by their divisions over the worship of God at Jerusalem, in accord with the book of Moses.
Numbers 3:6
"Bring the tribe of Levi near, and present them before Aaron the priest, that they may serve him.
1 Chronicles 24:1
The divisions of Aaron's descendants were as follows: The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar.
2 Chronicles 35:4-5
Prepare yourselves by your families according to your divisions, as instructed by King David of Israel and his son Solomon.
Numbers 8:9-26
You are to bring the Levites before the tent of meeting and assemble the entire community of the Israelites.
1 Chronicles 23:1-26
When David was old and approaching the end of his life, he made his son Solomon king over Israel.