3 And the Levites were numbered from thirty years old and upward: and their number by their polls, man by man, was thirty and 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.