All Israel - gave the portions of the singers - The singers and the porters were supported by the people at large; and each of these had their portions served out to them daily.
And they sanctified - unto the Levites - The things which were provided for sacred uses were delivered by the people to the Levites, and the Levites presented them to the priests.
The children of Aaron - This may refer principally to the tithes which the people brought to the Levites; the tithe or tenth of which the Levites gave to the priests. The presenting these tithes is termed sanctifying them; that is, dedicating them to those sacred or ecclesiastical uses for which they were designed: this is a very general meaning of the word sanctify in Scripture.
The intention is to compare the religious activity and strictness of Nehemiah‘s time with that which had prevailed under Zerubbabel, as described by Ezra Ezra 6:16, Ezra 6:22. It is implied that the intermediate period had been a time of laxity.
They sanctified holy things - i. e, “the people paid their tithes regularly to the Levites, and the Levites paid the tithe of the tithes to the priests.”