2 Chronicles 29:3, 16

In the first year of his reign, in the first month, he opened the doors of the house of the LORD and repaired them.

So the priests went in to the inner part of the house of the LORD to cleanse it, and every unclean thing which they found in the temple of the LORD they brought out to the court of the house of the LORD. Then the Levites received it to carry out to the Kidron valley.