2CH 5:13

13 It came even to pass, as the trumpeters and meshorarim were as one, making kol echad [(one voice, one sound)] to be heard in praising and thanking Hashem; and when they lifted up their voice with the trumpets and cymbals and musical instruments, and praised Hashem, saying, Ki tov ki l'olam chasdo [(For He is good; for His mercy endureth forever)], that then the Beis was filled with an anan, even the Beis Hashem,