1 Chronicles 25:5-7

Young's Literal Translation

⁵ all these [are] sons of Heman -- seer of the king in the things of God -- to lift up a horn; and God giveth to Heman fourteen sons and three daughters.

⁶ All these [are] by the side of their father in the song of the house of Jehovah, with cymbals, psalteries, and harps, for the service of the house of God; by the side of the king [are] Asaph, and Jeduthun, and Heman.

⁷ And their number, with their brethren -- taught in the song of Jehovah, all who are intelligent -- is two hundred, eighty and eight.