John Gill Commentary Nehemiah 13:10

"And I perceived that the portions of the Levites had not been given them; so that the Levites and the singers, that did the work, were fled every one to his field." — Nehemiah 13:10 (ASV)

And I perceived that the portion of the Levites had not been
given them
The tithes, being removed to some other place, might be converted to another use; or the people, seeing what was done by Eliashib, neglected to bring them in, as judging they would not be properly disposed of; and besides, the Levites had deserted their station upon this:

for the Levites and the singers that did the work were fled everyone
to his field ;
to look after their country farms, or to get their living by agriculture, since there was no care taken of them at Jerusalem; see (Nehemiah 12:28Nehemiah 12:29) .