1 Chronicles 23:5-7

Webster(i) 5 Moreover, four thousand were porters; and four thousand praised the LORD with the instruments which I made, said David, to praise with them. 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.