English Standard Version
Thus tongues are a sign not for believers but for unbelievers, while prophecy is a sign not for unbelievers but for believers.New International Version
Tongues, then, are a sign, not for believers but for unbelievers; prophecy, however, is for believers, not for unbelievers.Catholic Public Domain Version
And so, tongues are a sign, not for believers, but for unbelievers; and prophecies are not for unbelievers, but for believers