1st Chronicles 25:8

5 All these were sons of Heman, the king's seer in the words of God. And to make great his power God gave Heman fourteen sons and three daughters.

6 All these, under the direction of their father, made music in the house of the Lord, with brass and corded instruments, for the worship of the house of God; Asaph, Jeduthun, and Heman being under the orders of the king.

7 And the number of them, with their brothers who were trained and expert in making melody to the Lord, was two hundred and eighty-eight.

8 And selection was made of them for their special work, all having equal chances, small as well as great, the teacher as the learner.

9 Now of the group of Asaph, the first name to come out was Joseph; the second Gedaliah; he and his brothers and sons were twelve?

10 The third Zaccur, with his sons and his brothers, twelve;

11 The fourth Izri, with his sons and his brothers, twelve;