“Judah and Benjamin” are the lay people of those two tribes.

The dedication of the wall. From this point on, Nehemiah speaks in his own person.

Judah and Benjamin
Not the tribes, but the names of the two princes, as Jarchi:

and Shemaiah and …

All our cities, all our houses, must have holiness to the Lord written upon them. The believer should undertake nothing that he does not d…