John Gill Commentary Ezra 10:16

"And the children of the captivity did so. And Ezra the priest, [with] certain heads of fathers` [houses], after their fathers` houses, and all of them by their names, were set apart; and they sat down in the first day of the tenth month to examine the matter." — Ezra 10:16 (ASV)

And the children of the captivity did so
Put away their strange wives:

and Ezra the priest, with certain chief of the fathers, after the house
of their fathers, and all of them by their names, were separated ;
from all their other business, and gave themselves up to attend to this wholly:

and sat down in the first day of the tenth month ;
the month Tebeth, which answers to part of December and January; this was ten days after the assembly of all the people met and broke up: these took their places in the great court, and there sat

to examine the matter ;
the accounts brought in from the several cities by the magistrates thereof, and recorded them.