1 Chronicles 23:6 in the King James Version
And David divided them into courses among the sons of Levi, namely, Gershon, Kohath, and Merari.
Context
5 four thousand were doorkeepers, and four thousand praised the LORD with the instruments which I made for giving praise.”
6 David divided them into divisions according to the sons of Levi: Gershon, Kohath, and Merari.
7 Of the Gershonites: Ladan and Shimei.