2 Chronicles 5:12 YLT

[12] and the Levites, the singers, to all of them, to Asaph, to Heman, to Jeduthun, and to their sons, and to their brethren, clothed in white linen, with cymbals, and with psalteries, and harps, are standing on the east of the altar, and with them priests, to a hundred and twenty, blowing with trumpets --