Leviticus 8:13
Then Moses presented Aaron’s sons, put tunics on them, wrapped sashes around them, and tied headbands on them, just as the LORD had commanded him.

Numbers 8:6-7
“Take the Levites from among the Israelites and make them ceremonially clean. / This is what you must do to cleanse them: Sprinkle them with the water of purification. Have them shave their whole bodies and wash their clothes, and so purify themselves.

Numbers 8:21-22
The Levites purified themselves and washed their clothes, and Aaron presented them as a wave offering before the LORD. Aaron also made atonement for them to cleanse them. / After that, the Levites came to perform their service at the Tent of Meeting in the presence of Aaron and his sons. Thus they did with the Levites just as the LORD had commanded Moses.

Numbers 3:3
These were Aaron’s sons, the anointed priests, who were ordained to serve as priests.

Numbers 18:7
But only you and your sons shall attend to your priesthood for everything concerning the altar and what is inside the veil, and you are to perform that service. I am giving you the work of the priesthood as a gift, but any outsider who comes near the sanctuary must be put to death.”

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.

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 12:30
After the priests and Levites had purified themselves, they purified the people, the gates, and the wall.

Psalm 132:9
May Your priests be clothed with righteousness, and Your saints shout for joy.

Isaiah 61:6
But you will be called the priests of the LORD; they will speak of you as ministers of our God; you will feed on the wealth of nations, and you will boast in their riches.

Ezekiel 44:15-16
But the Levitical priests, who are descended from Zadok and who kept charge of My sanctuary when the Israelites went astray from Me, are to approach Me to minister before Me. They will stand before Me to offer Me fat and blood, declares the Lord GOD. / They alone shall enter My sanctuary and draw near to My table to minister before Me. They will keep My charge.

Hebrews 5:1-4
Every high priest is appointed from among men to represent them in matters relating to God, to offer gifts and sacrifices for sins. / He is able to deal gently with those who are ignorant and misguided, since he himself is subject to weakness. / That is why he is obligated to offer sacrifices for his own sins, as well as for the sins of the people. ...

Hebrews 7:26-28
Such a high priest truly befits us—One who is holy, innocent, undefiled, set apart from sinners, and exalted above the heavens. / Unlike the other high priests, He does not need to offer daily sacrifices, first for His own sins and then for the sins of the people; He sacrificed for sin once for all when He offered up Himself. / For the law appoints as high priests men who are weak; but the oath, which came after the law, appointed the Son, who has been made perfect forever.

Hebrews 9:6-7
When everything had been prepared in this way, the priests entered regularly into the first room to perform their sacred duties. / But only the high priest entered the second room, and then only once a year, and never without blood, which he offered for himself and for the sins the people had committed in ignorance.

Hebrews 10:11-12
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.