71 Then it was, when the wall was built and I had hung the doors, when the gatekeepers, the singers, and the Levites had been appointed, 2 that I gave the charge of Jerusalem to my brother Hanani, and Hananiah the leader of the citadel, for he was a faithful man and feared God more than many. 3 And I said to them, "Do not let the gates of Jerusalem be opened until the sun is hot; and while they stand guard, let them shut and bar the doors; and appoint guards from among the inhabitants of Jerusalem, one at his watch station and another in front of his own house." 4 Now the city was large and spacious, but the people in it were few, and the houses were not rebuilt.
Matthew Henry's Commentary on Nehemiah 7:1-4
Commentary on Nehemiah 7:1-4
(Read Nehemiah 7:1-4)
Nehemiah, having finished the wall, returned to the Persian court, and came to Jerusalem again with a new commission. The public safety depends on every one's care to guard himself and his family against sin.