1 Chronicles 6:33, 39, 44

These men and their sons served from the Kohathites: Heman the singer, the son of Joel, the son of Samuel [the great prophet and judge]

Heman’s [tribal] brother Asaph stood at his right hand: Asaph the son of Berechiah, the son of Shimea

Their relatives the sons of Merari stood at the left hand: Ethan the son of Kishi, the son of Abdi, the son of Malluch