1 Chronicles 25:5-8

5All these were the sons of Heman the king’s seer in the words of God, to lift up the horn. And God gave to Heman fourteen sons and three daughters. 6All these were under the hands of their father for song in the house of Jehovah, with cymbals, psalteries, and harps, for the service of the house of God; Asaph, Jeduthun, and Heman being under the order of the king. 7And the number of them, with their brethren that were instructed in singing unto Jehovah, even all that were skilful, was two hundred fourscore and eight. 8And they cast lots for their offices, all alike, as well the small as the great, the teacher as the scholar.