2 Chronicles 5:11-13

11Now all the priests who were present had consecrated themselves regardless of their divisions. And when the priests came out of the Holy Place, 12all the Levitical singers—Asaph, Heman, Jeduthun, and their sons and relatives—stood on the east side of the altar, dressed in fine linen and playing cymbals, harps, and lyres, accompanied by 120 priests sounding trumpets. 13The trumpeters and singers joined together to praise and thank the LORD with one voice. They lifted up their voices, accompanied by trumpets, cymbals, and musical instruments, in praise to the LORD:

And the temple, the house of the LORD, was filled with a cloud