1 Chronicles 25:9

All these were under the hands of their father for song in the LORD’s house, with cymbals, stringed instruments, and harps, for the service of God’s house: Asaph, Jeduthun, and Heman being under the order of the king.

The number of them, with their brothers who were instructed in singing to the LORD, even all who were skillful, was two hundred eighty-eight.

They cast lots for their offices, all alike, the small as well as the great, the teacher as well as the student.

the third to Zaccur, his sons and his brothers, twelve;

the fourth to Izri, his sons and his brothers, twelve;

the fifth to Nethaniah, his sons and his brothers, twelve;