1 Chronicles 23:2
And he gathered together all the princes of Israel, with the priests and the Levites. (1 Chronicles 23:2)
The Levites.
Chapters 23-26 discuss the organization of the priests and Levites. The present chapter presents a summary of the number and duties of the Levites.
Gathered together.
 This probably was done shortly before David’s death, in connection with the arrangements being put through for the transference of the kingdom from David to Solomon “in the fortieth year of the reign of David” (see ch. 26:31).