Commentaries
12:44-47 When the solemnities of a thanksgiving day leave such impressions on ministers and people, that both are more careful and cheerful in doing their duty, they are indeed acceptable to the Lord, and turn to good account. And whatever we do, must be purified by the blood of sprinkling, and by the grace of the Holy Spirit, or it cannot be acceptable to God.
45. the singers and the porters kept … the ward of the purification—that is, took care that no unclean person was allowed to enter within the precincts of the sacred building. This was the official duty of the porters (2Ch 23:19), with whom, owing to the pressure of circumstances, it was deemed expedient that the singers should be associated as assistants.