2 Chronicles 29:15-17

15They gathered their brothers together, consecrated themselves, and went according to the king’s command by the words of the Lord to cleanse the Lord’s temple.

16The priests went to the entrance of the Lord’s temple to cleanse it. They took all the unclean things they found in the Lord’s sanctuary to the courtyard of the Lord’s temple. Then the Levites received them and took them outside to the Kidron Valley.

17They began the consecration on the first day of the first month, and on the eighth day of the month they came to the portico of the Lord’s temple. They consecrated the Lord’s temple for eight days, and on the sixteenth day of the first month they finished.