1 Chronicles 23:6 in the World English Bible
David divided them into divisions according to the sons of Levi: Gershon, Kohath, and Merari.
Context
5 Moreover four thousand were porters; and four thousand praised the LORD with the instruments which I made, said David, to praise therewith.
6 And David divided them into courses among the sons of Levi, namely, Gershon, Kohath, and Merari.
7 Of the Gershonites were, Laadan, and Shimei.