1 Chronicles 25:8

All these were the sons of Heman the king’s seer in the words of God, to lift up the horn. God gave to Heman fourteen sons and three daughters.

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.

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

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

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