1 Chronicles 23:24

24 These were the sons of Levi in their kindreds and families, and they were princes by whiles, and the number of all the heads, that did the travail of the service of the house of the Lord, from twenty years and above. (These were the Levites in their kindreds and families, and the list of all their leaders, yea, those who did the work in the service of the House of the Lord, from twenty years of age and older.)

1 Chronicles 23:24 Meaning and Commentary

1 Chronicles 23:24

These were the sons of Levi, after the house of their fathers,
&c.] According to the three classes of them, as descending from the three sons of Levi:

[even] the chief of the fathers;
or heads of families:

as they were counted by number of names by their polls;
or according to their heads, one by one:

that did the work for the service of the house of the Lord;
the particulars of which are in ( 1 Chronicles 23:28-31 )

from the age of twenty years, and upwards;
they were first numbered thirty and upwards, ( 1 Chronicles 23:3 ) , but David before his death ordered they should be numbered from twenty and upwards, ( 1 Chronicles 23:27 ) , because the Israelites being increased, there would be more work for the priests in the temple, which would require the assistance of more Levites. The reasons follow.

1 Chronicles 23:24 In-Context

22 And Eleazar was dead, and had not sons, but daughters; and the sons of Kish, the brethren of them, that is, (the) cousins-german, wedded them. (And Eleazar died, and had no sons, but only daughters; and the sons of Kish, their kinsmen, that is, their first cousins, wedded them.)

23 The sons of Mushi were three, Mahli, and Eder, and Jeremoth.

24 These were the sons of Levi in their kindreds and families, and they were princes by whiles, and the number of all the heads, that did the travail of the service of the house of the Lord, from twenty years and above. (These were the Levites in their kindreds and families, and the list of all their leaders, yea, those who did the work in the service of the House of the Lord, from twenty years of age and older.)

25 For David said, The Lord God of Israel hath given rest to his people, and a dwelling in Jerusalem into without end; (For David said, The Lord God of Israel hath given rest to his people, and shall make his dwelling place in Jerusalem forevermore;)

26 and it shall not be the office of (the) deacons for to bear [any] more the tabernacle, and all the vessels thereof for to minister therein. (and it shall not be the duty of the Levites to carry about the Tabernacle any more, or any of the vessels for its service.)