2 Chronicles 5:11-14 (NRSV)
11 Now when the priests came out of the holy place (for all
the priests who were present had sanctified themselves, without
regard to their divisions),
12 all the levitical singers, Asaph, Heman, and Jeduthun,
their sons and kindred, arrayed in fine linen, with cymbals, harps,
and lyres, stood east of the altar with one hundred twenty priests
who were trumpeters.
13 It was the duty of the trumpeters and singers to make
themselves heard in unison in praise and thanksgiving to the Lord,
and when the song was raised, with trumpets and cymbals and other
musical instruments, in praise to the Lord, "For he is good,
for his steadfast love endures forever," the house, the house
of the Lord, was filled with a cloud,
14 so that the priests could not stand to minister because
of the cloud; for the glory of the Lord filled the house of God.