And David organized them in divisions corresponding to the sons of Levi: Gershon, Kohath, and Merari.
Here we have, I. The crown entailed, according to the divine appointment, Ch1 23:1. David made Solomon king, not to reign with him, or reign under him, but only to reign after him. This he did, 1. When he was old and full of days. He was but seventy years old when he died, and yet he was full of days, satur dierum - satisfied with living in this world.
Commenting on 1 Chronicles 23:1-23
And David divided them into courses among the sons of Levi,.... Into three classes, according to the number of them, which follow: namely: Gershon, Kohath, and Merari; see Exo 6:16.
David divided them into courses among the sons of Levi--These are enumerated according to their fathers' houses, but no more of these are mentioned here than the twenty-four thousand who were engaged in the work connected with the Lord's house. The fathers' houses of those Levites corresponded with the classes into which they [JOSEPHUS, Antiquities] as well as the priests were divided (see on Ch1 24:20-31; Ch1 26:20-28).