2 Chronicles 29:15
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.
2 Chronicles 30:12
Also in Judah the hand of God was to give them one heart to do the commandment of the king and of the princes, by the word of the LORD.
1 Chronicles 23:28
Because 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 chambers, and in the purifying of all holy things, and the work of the service of the house of God;
2 Chronicles 29:5
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.