'Prophesying' in the Bible

And David and the heads of the host separate for service, of the sons of Asaph, and Heman, and Jeduthun, who are prophesying with harps, with psalteries, and with cymbals, and the number of the workmen is according to their service.

Of sons of Asaph: Zaccur, and Joseph, and Nethaniah, and Asharelah, sons of Asaph, are by the side of Asaph, who is prophesying by the side of the king.

From Jeduthun: Jeduthun’s sons:Gedaliah, Zeri, Jeshaiah, Shimei, Hashabiah, and Mattithiah—six—under the authority of their father Jeduthun, prophesying to the accompaniment of lyres, giving thanks and praise to the Lord.