1 Chronicles — Chapter 25

David sets apart the sons of Asaph, Heman, and Idithun \"to prophesy with harps and psalteries and cymbals.\" Lapide: These Levitical singers are called \"prophets\" because singing praise is a form of prophecy — as Saul \"prophesied,\" i.e. sang God's praises (I Sam. 10:3). The twenty-four orders of sacred musicians correspond to the twenty-four orders of priests, serving in matched turns.