2 Chronicles 5:11-13

The priests then left the Holy Place. All the priests there were consecrated, regardless of rank or assignment; and all the Levites who were musicians were there—Asaph, Heman, Jeduthun, and their families, dressed in their worship robes; the choir and orchestra assembled on the east side of the Altar and were joined by 120 priests blowing trumpets. The choir and trumpets made one voice of praise and thanks to GOD—orchestra and choir in perfect harmony singing and playing praise to GOD: Yes! God is good! His loyal love goes on forever!