Matthew Henry on Nehemiah 12:44–end
We have here an account of the remaining good effects of the universal joy that was at the dedication of the wall. When the solemnities of a thanksgiving day leave such impressions on ministers and people as that both are more careful and cheerful in doing their duty afterwards, then they are indeed acceptable to God and turn to a good account. So it was here. 1. The ministers were more careful than they had been of their work; the respect the people paid them upon this occasion encouraged them to diligence and watchfulness, Neh 12:45. The singers kept the ward of their God, attending in due time to the duty of their office; the porters, too, kept the ward of the purification, that is, they…
Read the whole note in the consoleJamieson-Fausset-Brown on Nehemiah 12:45
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 (Ch2 23:19), with whom, owing to the pressure of circumstances, it was deemed expedient that the singers should be associated as assistants.
Adam Clarke on Nehemiah 12:38
The broad wall - What part this was, we know not: it might have been a place designed for a public promenade, or a parade for assembling the troops or guard of the temple.
John Gill on Nehemiah 12:46
For in the days of David and Asaph of old there were chief of the singers,.... Persons appointed over the rest to instruct them, and see that they did their work aright, as besides Asaph, Haman, and Jeduthun, and their sons, 1 Chronicles 25:2
and songs of praise and thanksgiving unto God; such were made by them, some under divine inspiration, which bear the names of David and Asaph, as may be observed in the book of Psalms.
Keil & Delitzsch on Nehemiah 12:45–end