Charles Ellicott Commentary 2 Chronicles 29:5

"and said unto them, Hear me, ye Levites; now sanctify yourselves, and sanctify the house of Jehovah, the God of your fathers, and carry forth the filthiness out of the holy place." — 2 Chronicles 29:5 (ASV)

Hear me. — 2 Chronicles 15:2; 2 Chronicles 20:15.

Sanctify now yourselves. — See Note on 1 Chronicles 15:12; 1 Chronicles 15:14.

Sanctify the house. — By removing all symbols of idolatry.

Carry forth the filthiness. — Niddah denotes personal impurity (Leviticus 12:2; Ezekiel 18:6); and thus anything loathsome (Ezekiel 7:19); here probably idols, and things connected with their worship.