Kehillah in Corinth I 14:22

Orthodox Jewish Bible

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.