2 Chronicles 29:25-26

29:25 And he set the Levites in the house of the LORD with cymbals, with psalteries, and with harps, according to the commandment of David, and of Gad the king’s seer, and Nathan the prophet: for [so was] the commandment of the LORD by his prophets. 29:26 And the Levites stood with the instruments of David, and the priests with the trumpets.