Numbers 3:6-9
“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 18:1-7
So the LORD said to Aaron, “You and your sons and your father’s house must bear the iniquity involving the sanctuary. And you and your sons alone must bear the iniquity involving your priesthood. / But bring with you also your brothers from the tribe of Levi, the tribe of your father, that they may join you and assist you and your sons before the Tent of the Testimony. / And they shall attend to your duties and to all the duties of the Tent; but they must not come near to the furnishings of the sanctuary or the altar, or both they and you will die. ...

Deuteronomy 10:8
At that time the LORD set apart the tribe of Levi to carry the ark of the covenant of the LORD, to stand before the LORD to serve Him, and to pronounce blessings in His name, as they do to this day.

Joshua 21:1-3
Now the family heads of the Levites approached Eleazar the priest, Joshua son of Nun, and the heads of the other tribes of Israel / at Shiloh in the land of Canaan and said to them, “The LORD commanded through Moses that we be given cities in which to live, together with pasturelands for our livestock.” / So by the command of the LORD, the Israelites gave the Levites these cities and their pasturelands out of their own inheritance:

1 Chronicles 23:13
The sons of Amram: Aaron and Moses. Aaron and his descendants were set apart forever to consecrate the most holy things, to burn incense before the LORD, to minister before Him, and to pronounce blessings in His name forever.

1 Chronicles 15:2
Then David said, “No one but the Levites may carry the ark of God, because the LORD has chosen them to carry the ark of the LORD and to minister before Him forever.”

1 Chronicles 16:4-6
David appointed some of the Levites to minister before the ark of the LORD, to celebrate, to give thanks, and to praise the LORD, the God of Israel. / Asaph was the chief, Zechariah was second, then Jeiel, Shemiramoth, Jehiel, Mattithiah, Eliab, Benaiah, Obed-edom, and Jeiel. They were to play the harps and lyres, while Asaph sounded the cymbals / and the priests Benaiah and Jahaziel blew the trumpets regularly before the ark of the covenant of God.

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.”

Nehemiah 12:24
The leaders of the Levites were Hashabiah, Sherebiah, and Jeshua son of Kadmiel, along with their associates, who stood across from them to give praise and thanksgiving as one section alternated with the other, as prescribed by David the man of God.

Psalm 134:1
A song of ascents. Come, bless the LORD, all you servants of the LORD who serve by night in the house of the LORD!

Hebrews 7:11-17
Now if perfection could have been attained through the Levitical priesthood (for on this basis the people received the law), why was there still need for another priest to appear—one in the order of Melchizedek and not in the order of Aaron? / For when the priesthood is changed, the law must be changed as well. / He of whom these things are said belonged to a different tribe, from which no one has ever served at the altar. ...

Hebrews 8:1-6
The point of what we are saying is this: We do have such a high priest, who sat down at the right hand of the throne of the Majesty in heaven, / and who ministers in the sanctuary and true tabernacle set up by the Lord, not by man. / And since every high priest is appointed to offer both gifts and sacrifices, it was necessary for this One also to have something to offer. ...

Hebrews 9:1-10
Now the first covenant had regulations for worship and also an earthly sanctuary. / A tabernacle was prepared. In its first room were the lampstand, the table, and the consecrated bread. This was called the Holy Place. / Behind the second curtain was a room called the Most Holy Place, ...

Hebrews 10:11-14
Day after day every priest stands to minister and to offer again and again the same sacrifices, which can never take away sins. / But when this Priest had offered for all time one sacrifice for sins, He sat down at the right hand of God. / Since that time, He waits for His enemies to be made a footstool for His feet, ...

1 Peter 2:5
you also, like living stones, are being built into a spiritual house to be a holy priesthood, offering spiritual sacrifices acceptable to God through Jesus Christ.