1 Chronicles 25:5-7

Darby Translation

⁵ all these were sons of Heman the king's seer in the words of God, to exalt his power; and God had given to Heman fourteen sons and three daughters.

⁶ All these were under the direction of their fathers Asaph, Jeduthun, and Heman, for song in the house of Jehovah, with cymbals, lutes and harps, for the service of the house of God, under the direction of the king.

⁷ And the number of them, with their brethren that were instructed in the songs of Jehovah, all of them skilful, was two hundred and eighty-eight.