Numbers 8:22
And then the Levites went in to do their work in the Tent of meeting before Aaron and his sons: all the orders which the Lord had given Moses about the Levites were put into effect.
Numbers 8:15
After that, the Levites will go in to do whatever has to be done in the Tent of meeting; you are to make them clean and give them as a wave offering.
2 Chronicles 30:15-17
Then on the fourteenth day of the second month they put the Passover lambs to death: and the priests and the Levites were shamed, and made themselves holy and took burned offerings into the house of the Lord.
2 Chronicles 30:27
Then the priests and the Levites gave the people a blessing: and the voice of their prayer went up to the holy place of God in heaven.
2 Chronicles 31:2
Then Hezekiah put in order the divisions of the priests and Levites, every man in his division, in relation to his work, for the burned offerings and peace-offerings, and for the ordering of worship and for giving praise at the doors of the Lord's house.
2 Chronicles 35:8-15
And his captains freely gave an offering to the people, the priests, and the Levites. Hilkiah and Zechariah and Jehiel, the rulers of the house of God, gave to the priests for the Passover offerings two thousand, six hundred small cattle and three hundred oxen.