1 Chronicles 23:7 KJV

5Moreover four thousand were porters; and four thousand praised the LORD with the instruments which I made, said David, to praise therewith.

6And David divided them into courses among the sons of Levi, namely, Gershon, Kohath, and Merari.

7Of the Gershonites were, Laadan, and Shimei.

8The sons of Laadan; the chief was Jehiel, and Zetham, and Joel, three.

9The sons of Shimei; Shelomith, and Haziel, and Haran, three. These were the chief of the fathers of Laadan.