Moreover, David and the captains of the host set apart for the service certain of the sons of Asaph, and of Heman, and of Jeduthun, who should prophesy with harps, with psalteries, and with cymbals: and the number of those who did the work according to their service was:
"Who should prophesy with harps, psalteries, etc."; 1 Chronicles 25:1. The Good News Bible probably has the correct meaning here: "They were to proclaim God's messages accompanied by the music of harps and cymbals."