David divided them into courses Which he did not by his own invention, but, as a man of God, by his command, and with the advice and concurrence of Gad and Nathan the prophets, as is manifest from 2 Chronicles 8:14; 2 Chronicles 29:25.
Related Commentaries of 1 Chronicles 23:6
1 Chronicles 23:6
6 And David divided them into coursesa among the sons of Levi, namely, Gershon, Kohath, and Merari.