John Gill Commentary 2 Chronicles 8:15

"And they departed not from the commandment of the king unto the priests and Levites concerning any matter, or concerning the treasures." — 2 Chronicles 8:15 (ASV)

And they departed not from the commandment of the king unto
the priests and Levites
The priests and Levites departed not from it, not from the commandment of Solomon, according to the order of David, but in all things obeyed it:

concerning any matter ;
which related to the office of either of them, sacrificers, singers, or porters:

or concerning the treasures ;
such of the Levites as had the care of them were faithful to their trust, see (1 Chronicles 26:20)