David and the chiefs of the service also set apart for the service the sons of Asaph, and of Heman, and of Jeduthun, who prophesied with lyres, with harps, and with cymbals. The list of those who did the work and of their duties was: 2 Of the sons of Asaph: Zaccur, Joseph, Nethaniah, and Asharelah, sons of Asaph, under the direction of Asaph, who prophesied under the direction of the king. —1 Choronicles 25
Singing the praises of God is here called prophesying (1 Chronicles 25:1-3), not that all those who were employed in this service were honoured with the visions of God, or could foretel things to come. Heman indeed is said to be the king’s seer in the words of God (1 Chronicles 25:5); but the psalms they sang were composed by the prophets, and many of them were prophetical; and the edification of the church was intended in it, as well as the glory of God. In Samuel’s time singing the praises of God went by the name of prophesying (1 Samuel 10:5,19:20), and perhaps that is intended in what St. Paul calls prophesying, 1 Corinthians 11:4,14:24.