2 Chronicles 5:11 TLB

[11] When the priests had undergone the purification rites for themselves, they all took part in the ceremonies without regard to their normal duties. And how the Levites were praising the Lord as the priests came out of the Holy of Holies! The singers were Asaph, Heman, Jeduthun, and all their sons and brothers, dressed in finespun linen robes and standing at the east side of the altar. The choir was accompanied by 120 priests who were trumpeters, while others played the cymbals, lyres, and harps.