3 Now the Levites were numbered from the age of thirty years and above; and the number of individual males was thirty-eight thousand.

Matthew Henry's Commentary on 1 Chronicles 23:3

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.