6 David then divided the Levites into groupings named after the sons of Levi: Gershon, Kohath, and Merari. 7 The Gershonites: Ladan and Shimei. 8 The three sons of Ladan: Jehiel, Zetham, and Joel. 9 The three sons of Shimei: Shelomoth, Haziel, and Haran, all heads of the families of Ladan. 10 The four sons of Shimei: Jahath, Ziza, Jeush, and Beriah. 11 Jahath came first, followed by Ziza. Jeush and Beriah did not have many sons so they were counted as one family with one task. 12 The four sons of Kohath: Amram, Izhar, Hebron, and Uzziel. 13 The sons of Amram: Aaron and Moses. Aaron was especially ordained to work in the Holy of Holies, to burn incense before God, to serve God and bless his Name always. This was a permanent appointment for Aaron and his sons.

Matthew Henry's Commentary on 1 Chronicles 23:6-13

Commentary on 1 Chronicles 23:1-23

(Read 1 Chronicles 23:1-23)

David, having given charge concerning the building of the temple, settles the method of the temple service, and orders the officers of it. When those of the same family were employed together, it would engage them to love and assist one another.