2 Chronicles 29:15-17

15These men gathered their relatives and performed the ceremonies to make themselves holy. Then they obeyed the king’s order from the Lord’s word and entered the temple to make it clean.

16The priests entered the Lord’s temple to make it clean. They carried into the courtyard every unclean thing that they found in the Lord’s temple. Then the Levites took the unclean items outside the city to the Kidron Brook.

17They started on the first day of the first month. On the eighth day they went into the Lord’s entrance hall, and for eight days they performed the ceremonies to make the Lord’s temple holy. They finished on the sixteenth day of the first month.