'Direction' in the Bible
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 with the harp, who prophesied in giving thanks and praising the Lord.
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 direction of the king.