1 Chronicles 25:7-9

Revised Standard Version

⁷ The number of them along with their brethren, who were trained in singing to the Lord, all who were skilful, was two hundred and eighty-eight. ⁸ And they cast lots for their duties, small and great, teacher and pupil alike.

⁹ The first lot fell for Asaph to Joseph; the second to Gedali′ah, to him and his brethren and his sons, twelve;