2 Chronicles 29:3-5

In the first year of his reign, in the first month, he opened the doors of the house of the LORD and repaired them. He brought in the priests and the Levites and gathered them into the square on the east. Then he said to them, “Listen to me, O Levites. Consecrate yourselves now, and consecrate the house of the LORD, the God of your fathers, and carry the uncleanness out from the holy place.