Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe.
Tongues, then, are a sign, not for believers but for unbelievers; prophecy, however, is not for unbelievers but for believers.
Ὥστε αἱ γλῶσσαι εἰς σημεῖόν εἰσιν, οὐ τοῖς πιστεύουσιν, ἀλλὰ τοῖς ἀπίστοις· ἡ δὲ προφητεία, οὐ τοῖς ἀπίστοις, ἀλλὰ τοῖς πιστεύουσιν.
Ōste ai glōssai eis sēmeion eisin, oy tois pisteyoysin, alla tois apistois· ē de prophēteia, oy tois apistois, alla tois pisteyoysin.