1 Chronicles 25:8

6All 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.

7The number of them, with their brothers who were instructed in singing to the LORD, even all who were skillful, was two hundred eighty-eight.

8They cast lots for their offices, all alike, the small as well as the great, the teacher as well as the student.

9Now the first lot came out for Asaph to Joseph; the second to Gedaliah, he and his brothers and sons were twelve;

10the third to Zaccur, his sons and his brothers, twelve;