2 Chronicles 29:15
They gathered their brothers, and sanctified themselves, and went in, according to the commandment of the king by the words of the LORD, to cleanse the house of the LORD.
2 Chronicles 30:12
Also in Judah came the hand of God to give them one heart, to do the commandment of the king and of the leaders by the word of the LORD.
1 Chronicles 23:28
For their office was to wait on the sons of Aaron for the service of the house of the LORD, in the courts, and in the rooms, and in the purifying of all holy things, even the work of the service of God's house;
2 Chronicles 29:5
and said to them, "Listen to me, you Levites. Now sanctify yourselves, and sanctify the house of the LORD, the God of your fathers, and carry out the filthiness out of the holy place.