2 Chronicles 29:17

17. They began on the first day… and in the sixteenth day… they made an end Their exact order of procedure is to be gathered from the whole passage, and the supposable natural order of things. First, of course, the priests and Levites were assembled and addressed by the king, (2 Chronicles 29:4-11;) next they sanctified themselves, (2 Chronicles 29:15;) then they proceeded to repair the doors and cleanse the courts of the temple, and had this work done on the eighth day of the month. The cleansing of the temple itself occupied another eight days, so it was not until the sixteenth of the month that their work was accomplished.