1 Chronicles 25:5-7

Amplified Bible, Classic Edition

⁵ All these were the sons of Heman the king’s seer [his mediator] in the words and things of God to exalt Him; for God gave to Heman fourteen sons and three daughters,^(A)

⁶ All of whom were [in the choir] under the direction of their father for song in the house of the Lord, with cymbals, harps, and lyres, for the service of the house of God. Asaph, Jeduthun, and Heman were under the order of the king.

⁷ So the number of them [who led the remainder of the 4,000], with their kinsmen who were specially trained in songs for the Lord, all who were talented singers, was 288.^(B)