2 Chronicles 8:14

14 As David his father had ordered, he appointed the divisions of the cohanim for their service and the L'vi'im to their tasks - to praise and to perform their service in the presence of the cohanim according to each day's requirements. He also appointed the gatekeepers by their divisions to be at every gate, for David the man of God had so ordered.

2 Chronicles 8:14 Meaning and Commentary

2 Chronicles 8:14

And he appointed, according to the order of David his father,
the courses of the priests to their service
The twenty four courses which served weekly in their turns, ( 1 Chronicles 24:1-31 )

and the Levites to their charges, to praise and minister before the
priests, as duty of every day required;
who also had their courses by lot, to sing the praises of God, when the priests sacrificed, or blew the trumpets, ( 1 Chronicles 25:1-31 ) ,

the porters also by their courses at every gate;
from hence Dr. Lightfoot concludes that these were divided into twenty four classes, as the priests and Levite singers were:

for so had David the man of God commanded,
( 1 Chronicles 26:1-32 ) , who in all these affairs acted as a prophet, under the inspiration and direction of the Holy Spirit of God.

2 Chronicles 8:14 In-Context

12 Then Shlomo offered burnt offerings to ADONAI on the altar of ADONAI that he had built in front of the vestibule,

13 as each day required, offering according to the mitzvah of Moshe on Shabbats, at Rosh-Hodesh and at the designated times three times a year - the festivals of Matzah, Shavu'ot and Sukkot.

14 As David his father had ordered, he appointed the divisions of the cohanim for their service and the L'vi'im to their tasks - to praise and to perform their service in the presence of the cohanim according to each day's requirements. He also appointed the gatekeepers by their divisions to be at every gate, for David the man of God had so ordered.

15 They did not deviate from the king's order to the cohanim and L'vi'im in any matter or in regard to the supplies.

16 All the work of Shlomo was organized in this way from the day ground was broken for the house of ADONAI until everything had been accomplished, and the house of ADONAI had been completed.