2 Chronicles 5:12-13

12all the Levite singers—Asaph, Heman, Jeduthun, their sons and their relatives—dressed in fine linen with cymbals, harps and lyres, were standing at the east end of the altar and with them were 120 kohanim blowing trumpets.

13Then it came to pass that when the trumpeters and singers joined as one to extol and praise Adonai, and when the sound of the trumpets, cymbals and musical instruments and the praise of Adonai—“For He is good, for His mercy endures forever”—grew louder, the Temple, the House of Adonai, was filled with a cloud.