1 Chronicles 25:1-8

Moreover, David and the commanders of the army selected for the [temple] service some of the sons of Asaph, Heman, and Jeduthun, who were to prophesy with lyres, harps, and cymbals. The list of the musicians who performed their service was as follows: Of the sons of Asaph: Zaccur, Joseph, Nethaniah, and Asharelah; the sons of Asaph were under the direction of Asaph, who prophesied under the direction of the king. Of Jeduthun, the sons of Jeduthun: Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah, six, under the direction of their father Jeduthun, who prophesied with the lyre in thanksgiving and praise to the LORD. Of Heman, the sons of Heman: Bukkiah, Mattaniah, Uzziel, Shebuel, Jerimoth, Hananiah, Hanani, Eliathah, Giddalti, Romamti-ezer, Joshbekashah, Mallothi, Hothir, and Mahazioth. All these [men] were the sons of Heman the king’s seer to exalt him in accordance with the words of God; for God gave Heman fourteen sons and three daughters. [Ps 68:25] All these were under the direction of their father to sing 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 and direction of the king. So their number [who led the remainder of the 4,000], with their relatives who were trained in singing to the LORD, all who were skillful, was 288. [1 Chr 23:5] The musicians cast lots for their duties, everyone alike, the small (younger) as well as the great (older), the teacher as well as the student.