1 Chronicles 23:6 KJV
And David divided them into courses among the sons of Levi, namely, Gershon, Kohath, and Merari.
1 Chronicles 23:6, King James Version
In 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.