1 Chronicles 25:3

25:3 From the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Hashabiah, and Mattithiah – six in all, under supervision of their father Jeduthun, who prophesied as he played a harp, giving thanks and praise to the Lord.

1 Chronicles 25:11

25:11 the fourth to Izri and his sons and relatives – twelve in all,