1 Chronicles 23:3-13

3 and the Levites are numbered from a son of thirty years and upward, and their number, by their polls, is of mighty men thirty and eight thousand.
4 Of these to preside over the work of the house of Jehovah [are] twenty and four thousand, and officers and judges six thousand
5 and four thousand gatekeepers, and four thousand giving praise to Jehovah, `with instruments that I made for praising,' [saith David.]
6 And David distributeth them into courses: Of the sons of Levi: of Gershon, Kohath, and Merari.
7 Of the Gershonite: Laadan and Shimei.
8 Sons of Laadan: the head [is] Jehiel, and Zetham, and Joel, three.
9 Sons of Shimei [are] Shelomith, and Haziel, and Haran, three; these [are] heads of the fathers of Laadan.
10 And sons of Shimei [are] Jahath, Zina, and Jeush, and Beriah; these [are] sons of Shimei, four.
11 And Jahath is the head, and Zizah the second, and Jeush and Beriah have not multiplied sons, and they become the house of a father by one numbering.
12 Sons of Kohath [are] Amram, Izhar, Hebron, and Uzziel, four.
13 Sons of Amram: Aaron and Moses; and Aaron is separated for his sanctifying the holy of holies, he and his sons -- unto the age, to make perfume before Jehovah, to serve Him, and to bless in His name -- unto the age.

1 Chronicles 23:3-13 Meaning and Commentary

INTRODUCTION TO 1 CHRONICLES 23

In this chapter David makes Solomon king, 1Ch 23:1, calls together the princes, priests, and Levites, numbers the latter, and assigns them their proper work, 1Ch 23:2-5, divides them into three classes, 1Ch 23:6-23, when the number of them was taken from twenty years of age, and upwards; the reasons of which are given, partly from the rest the land enjoyed, and partly from the several branches of their work and office in the temple, 1Ch 23:24-32.

Young's Literal Translation is in the public domain.