2 Chronicles 5:11-12

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.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.