Numbers 8:22
And thus went the Levites in to serve in their ministry in the tabernacle of the testimony before Aaron and before his sons; in the manner that the LORD had commanded Moses concerning the Levites, so did they unto them.
Numbers 8:15
Thus shall the Levites go in to minister in the tabernacle of the testimony; and thou shalt cleanse them and wave them for an offering.
2 Chronicles 30:15-17
Then they killed the passover on the fourteenth day of the second month, and the priests and the Levites sanctified themselves with shame and brought in the burnt offerings into the house of the LORD.
2 Chronicles 30:27
Then the priests, the Levites, arose and blessed the people, and their voice was heard, and their prayer came up to the dwelling place of his sanctuary, unto heaven.
2 Chronicles 31:2
And Hezekiah appointed the courses of the priests and the Levites after their courses, each man according to his service, the priests and Levites for burnt offerings and for peace offerings, to minister and to give thanks and to praise in the gates of the tents of the LORD.
2 Chronicles 35:8-15
And his princes gave willingly unto the people, to the priests, and to the Levites. Hilkiah, Zechariah, and Jehiel, rulers of the house of God, gave unto the priests for the passover offerings two thousand six hundred sheep and three hundred oxen.