1CO 14:22

22 So then the leshonot [(tongues)] are for an ot [(miraculous sign)], not to the ones believing, the ma'aminim in Rebbe, Melech HaMoshiach, but an ot [(miraculous sign)] to the Apikorosim; but divrei hanevu'ah [(words of prophecy)] are not for the Apikorosim, but for the ones believing, the ma'aminim in Moshiach.