Numbers 3:6-8
“Bring the tribe of Levi and present them to Aaron the priest to assist him. / They are to perform duties for him and for the whole congregation before the Tent of Meeting, attending to the service of the tabernacle. / They shall take care of all the furnishings of the Tent of Meeting and fulfill obligations for the Israelites by attending to the service of the tabernacle.

Numbers 8:24-26
“This applies to the Levites: Men twenty-five years of age or older shall enter to perform the service in the work at the Tent of Meeting. / But at the age of fifty, they must retire from performing the work and no longer serve. / After that, they may assist their brothers in fulfilling their duties at the Tent of Meeting, but they themselves are not to do the work. This is how you are to assign responsibilities to the Levites.”

1 Chronicles 23:3-6
The Levites thirty years of age or older were counted, and the total number of men was 38,000. / “Of these,” said David, “24,000 are to oversee the work of the house of the LORD, 6,000 are to be officers and judges, / 4,000 are to be gatekeepers, and 4,000 are to praise the LORD with the instruments I have made for giving praise.” ...

1 Chronicles 23:24-32
These were the descendants of Levi by their families—the heads of families, registered individually by name—those twenty years of age or older who worked in the service of the house of the LORD. / For David had said, “The LORD, the God of Israel, has given rest to His people and has come to dwell in Jerusalem forever. / So now the Levites no longer need to carry the tabernacle or any of the articles for its service.” ...

1 Chronicles 24:1-19
These were the divisions of the descendants of Aaron. The sons of Aaron were Nadab, Abihu, Eleazar, and Ithamar. / But Nadab and Abihu died before their father did, and they had no sons; so Eleazar and Ithamar served as priests. / With the help of Eleazar’s descendant Zadok and Ithamar’s descendant Ahimelech, David divided them according to the offices of their service. ...

1 Chronicles 26:12-19
These divisions of the gatekeepers, through their chief men, had duties for ministering in the house of the LORD, just as their relatives did. / They cast lots for each gate, according to their families, young and old alike. / The lot for the East Gate fell to Shelemiah. Then lots were cast for his son Zechariah, a wise counselor, and the lot for the North Gate fell to him. ...

Exodus 6:18
The sons of Kohath were Amram, Izhar, Hebron, and Uzziel. Kohath lived 133 years.

Exodus 6:25
Aaron’s son Eleazar married one of the daughters of Putiel, and she bore him Phinehas. These were the heads of the Levite families by their clans.

Exodus 28:1
“Next, have your brother Aaron brought to you from among the Israelites, along with his sons Nadab, Abihu, Eleazar, and Ithamar, to serve Me as priests.

Leviticus 8:5-9
And Moses said to them, “This is what the LORD has commanded to be done.” / Then Moses presented Aaron and his sons and washed them with water. / He put the tunic on Aaron, tied the sash around him, clothed him with the robe, and put the ephod on him. He tied the woven band of the ephod around him and fastened it to him. ...

Leviticus 10:8-11
Then the LORD said to Aaron, / “You and your sons are not to drink wine or strong drink when you enter the Tent of Meeting, or else you will die; this is a permanent statute for the generations to come. / You must distinguish between the holy and the common, between the clean and the unclean, ...

1 Kings 8:4
and they brought up the ark of the LORD and the Tent of Meeting with all its sacred furnishings. So the priests and Levites carried them up.

2 Chronicles 29:11
Now, my sons, do not be negligent, for the LORD has chosen you to stand before Him, to serve Him, to minister before Him, and to burn incense.”

2 Chronicles 31:2
Hezekiah reestablished the divisions of the priests and Levites—each of them according to their duties as priests or Levites—for the burnt offerings and peace offerings, for ministry, for giving thanks, and for singing praises at the gates of the LORD’s dwelling.

Ezra 8:15-20
Now I assembled these exiles at the canal that flows to Ahava, and we camped there three days. And when I searched among the people and priests, I found no Levites there. / Then I summoned the leaders: Eliezer, Ariel, Shemaiah, Elnathan, Jarib, Elnathan, Nathan, Zechariah, and Meshullam, as well as the teachers Joiarib and Elnathan. / And I sent them to Iddo, the leader at Casiphia, with a message for him and his kinsmen, the temple servants at Casiphia, that they should bring to us ministers for the house of our God. ...