II Chronicles 29:5, 15-19

and said to them: “Hear me, Levites! Now sanctify yourselves, sanctify the house of the LORD God of your fathers, and carry out the rubbish from the holy place.

And they gathered their brethren, sanctified themselves, and went according to the commandment of the king, at the words of the LORD, to cleanse the house of the LORD. Then the priests went into the inner part of the house of the LORD to cleanse it, and brought out all the debris that they found in the temple of the LORD to the court of the house of the LORD. And the Levites took it out and carried it to the Brook Kidron. Now they began to sanctify on the first day of the first month, and on the eighth day of the month they came to the vestibule of the LORD. So they sanctified the house of the LORD in eight days, and on the sixteenth day of the first month they finished. Then they went in to King Hezekiah and said, “We have cleansed all the house of the LORD, the altar of burnt offerings with all its articles, and the table of the showbread with all its articles. Moreover all the articles which King Ahaz in his reign had cast aside in his transgression we have prepared and sanctified; and there they are, before the altar of the LORD.”