Nehemiah 12:47

47. Gave the portions The tithes and other contributions necessary for the support of the singers and porters.

They sanctified holy things unto the Levites They set apart, as things consecrated to holy uses, the portions designed for the Levites. Instead of holy things it is better simply to substitute them, referring to the portions just named.

And the Levites sanctified them unto the children of Aaron The Levites were required to give a tithe of the tithes (compare Nehemiah 10:38) to the priests, here called sons of Aaron. So of all the tithes committed to them they set apart a tenth for the priests. “Ye also shall offer a heave offering unto the Lord of all your tithes,” etc. See the law in Numbers 18:26-29.