Thus they were to keep charge of the tent of meeting and the sanctuary, and to attend the sons of Aaron, their brothers, for the service of the house of the LORD.
Here is, I. An alteration made in the computation of the effective men of the Levites - that whereas, in Moses's time, they were not enlisted, or taken into service, till they were thirty-years old, nor admitted as probationers till twenty-five (Num 8:24), David ordered, by direction from God, that they should be numbered for the service of the house of the Lord, from the...
Commenting on 1 Chronicles 23:24-32
The charge of the sons of Aaron - It was the priests' business to kill, flay, and dress, as well as to offer, the victims, but being few, they were obliged to employ the Levites to flay those animals. The Levites were, properly speaking, servants to the priests, and were employed about the more servile part of Divine worship.
1Ch 23:32 In conclusion, the whole duties of the Levites are summed up in three clauses: they were to keep the charge of the tabernacle, the charge of the sacred things, i.e., of all the sacred things of the worship, and the charge of the sons of Aaron, i.e., of all that the priests committed to them to be done; cf. Num 18:3., where these functions are more exactly fixed.