Matthew Poole and continuators on 1 Chronicles 23:24

24 These were the sons of Levi, after the house of their fathers; even the chief of the fathers, as they were counted by number of names by their polls, that did the work for the service of the house of the LORD, from the age of twenty years and upward.

As the Levites were anciently numbred from two several times, from the 25th. year of their Age, and from the 30th. Numb. 4. 3. & 8. 24. In like manner and for the same Reasons they are here numbred both from their 20th. year, as here, when they were more solemnly prepared for, and instructed, and by degrees exercised in some parts of their Work; and from their 30th. year, above v. 3. when they were admitted to the full and compleat Exercise of all the Parts and Works of their Office. And the Reason why they were now sooner admitted to Service than they had been formerly by the Constitution of Moses, is given in the next Verses, because now their Work was more easie, they being wholly discharged from that Burdensome Work of Carrying the Tabernacle and its Utensils, which was too heavy for young and tender Shoulders. To which may be added that the Number of the Israelites were [illegible: 1 word] increased, and consequently the Services which were to be performed by the Levites on their behalf were multiplied, and the Work of the Temple was much greater than that of the Tabernacle, and therefore more of the Levites were to be employed, and consequently they were to be sooner taken into Service.

Marginal references: Numb. 1[illegible: 1+ letters]. 17, 21.; Numb. [illegible: 1+ letters]. [illegible: 1+ letters]. 4. 3. & [illegible: 1+ letters]. 14.