I Chronicles 25:6-8

All these were under the direction of their father for the music in the house of the LORD, with cymbals, stringed instruments, and harps, for the service of the house of God. Asaph, Jeduthun, and Heman were under the authority of the king. So the number of them, with their brethren who were instructed in the songs of the LORD, all who were skillful, was two hundred and eighty-eight. And they cast lots for their duty, the small as well as the great, the teacher with the student.