2 Chronicles 29:10 (KJV)

And said unto them, Hear me, ye Levites, sanctify now yourselves, and sanctify the house of the LORD God of your fathers, and carry forth the filthiness out of the holy place.

For our fathers have trespassed, and done that which was evil in the eyes of the LORD our God, and have forsaken him, and have turned away their faces from the habitation of the LORD, and turned their backs.

Also they have shut up the doors of the porch, and put out the lamps, and have not burned incense nor offered burnt offerings in the holy place unto the God of Israel.

Wherefore the wrath of the LORD was upon Judah and Jerusalem, and he hath delivered them to trouble, to astonishment, and to hissing, as ye see with your eyes.

For, lo, our fathers have fallen by the sword, and our sons and our daughters and our wives are in captivity for this.

My sons, be not now negligent: for the LORD hath chosen you to stand before him, to serve him, and that ye should minister unto him, and burn incense.

Then the Levites arose, Mahath the son of Amasai, and Joel the son of Azariah, of the sons of the Kohathites: and of the sons of Merari, Kish the son of Abdi, and Azariah the son of Jehalelel: and of the Gershonites; Joah the son of Zimmah, and Eden the son of Joah:

And of the sons of Elizaphan; Shimri, and Jeiel: and of the sons of Asaph; Zechariah, and Mattaniah:

And of the sons of Heman; Jehiel, and Shimei: and of the sons of Jeduthun; Shemaiah, and Uzziel.

And they gathered their brethren, and sanctified themselves, and came, according to the commandment of the king, by the words of the LORD, to cleanse the house of the LORD.