1 Chronicles 23:5-7

Geneva(i) 5 And foure thousand were porters, and foure thousande praised the Lord with instruments which he made to praise the Lord. 6 So Dauid deuided offices vnto them, to wit, to the sonnes of Leui, to Gershon, Kohath, and Merari. 7 Of the Gershonites were Laadan and Shimei.