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 8:19
And I have given the Levites as a gift to Aaron and his sons from among the Israelites, to perform the service for the Israelites at the Tent of Meeting and to make atonement on their behalf, so that no plague will come against the Israelites when they approach the sanctuary.”

Numbers 18:2-6
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. / They are to join you and attend to the duties of the Tent of Meeting, doing all the work at the Tent; but no outsider may come near you. ...

1 Chronicles 23:28-32
but their duty was to assist the descendants of Aaron with the service of the house of the LORD, being responsible for the courts and chambers, the purification of all the holy things, and the work of the service of the house of God, / as well as for the rows of the showbread, the fine flour for the grain offering, the wafers of unleavened bread, the baking, the mixing, and all measurements of quantity and size. / They were also to stand every morning to give thanks and praise to the LORD, and likewise in the evening. ...

1 Chronicles 9:14-16
From the Levites: Shemaiah son of Hasshub, the son of Azrikam, the son of Hashabiah, a descendant of Merari; / Bakbakkar, Heresh, Galal, and Mattaniah son of Mica, the son of Zichri, the son of Asaph; / Obadiah son of Shemaiah, the son of Galal, the son of Jeduthun; and Berechiah son of Asa, the son of Elkanah, who lived in the villages of the Netophathites.

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
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.

1 Chronicles 23:4
“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,

1 Chronicles 25:1
Additionally, David and the commanders of the army set apart some of the sons of Asaph, Heman, and Jeduthun to prophesy with the accompaniment of lyres, harps, and cymbals. The following is the list of the men who performed this service:

2 Chronicles 8:14
In keeping with the ordinances of his father David, Solomon appointed the divisions of the priests over their service, and the Levites for their duties to offer praise and to minister before the priests according to the daily requirement. He also appointed gatekeepers by their divisions at each gate, for this had been the command of David, the man of God.

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.

Nehemiah 12:44-47
And on that same day men were appointed over the rooms that housed the supplies, contributions, firstfruits, and tithes. The portions specified by the Law for the priests and Levites were gathered into these storerooms from the fields of the villages, because Judah rejoiced over the priests and Levites who were serving. / They performed the service of their God and the service of purification, along with the singers and gatekeepers, as David and his son Solomon had prescribed. / For long ago, in the days of David and Asaph, there were directors for the singers and for the songs of praise and thanksgiving to God. ...

Nehemiah 13:10-14
I also learned that because the portions for the Levites had not been given to them, all the Levites and singers responsible for performing the service had gone back to their own fields. / So I rebuked the officials and asked, “Why has the house of God been neglected?” Then I gathered the Levites and singers together and stationed them at their posts, / and all Judah brought a tenth of the grain, new wine, and oil into the storerooms. ...

Ezekiel 44:11-14
Yet they shall be ministers in My sanctuary, having charge of the gates of the temple and ministering there. They shall slaughter the burnt offerings and other sacrifices for the people and stand before them to minister to them. / Because they ministered before their idols and became a stumbling block of iniquity to the house of Israel, therefore I swore with an uplifted hand concerning them that they would bear the consequences of their iniquity, declares the Lord GOD. / They must not approach Me to serve Me as priests or come near any of My holy things or the most holy things. They will bear the shame of the abominations they have committed. ...

Matthew 23:23
Woe to you, scribes and Pharisees, you hypocrites! You pay tithes of mint, dill, and cumin. But you have disregarded the weightier matters of the law: justice, mercy, and faithfulness. You should have practiced the latter, without neglecting the former.