2 Chronicles 5:12,13
Also the Levites which were the singers, all of them of Asaph, of Heman, of Jeduthun, with their sons and their brothers, being arrayed in white linen, having cymbals and psalteries and harps, stood at the east end of the altar, and with them an hundred and twenty priests sounding with trumpets:)
Nave's Topical Index—AKJV

2 Chronicles 7:6
And the priests waited on their offices: the Levites also with instruments of music of the LORD, which David the king had made to praise the LORD, because his mercy endures for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood.
Nave's Topical Index—AKJV