Berean Standard Bible (BSB)
Tongues, then, are a sign, not for believers, but for unbelievers. Prophecy, however, is for believers, not for unbelievers.
World English Bible (WEB)
Therefore other languages are for a sign, not to those who believe, but to the unbelieving; but prophesying is for a sign, not to the unbelieving, but to those who believe.
Strong's King James
Wherefore{G5620} tongues{G1100} are{G1526}{(G5748)} for{G1519} a sign{G4592}, not{G3756} to them that believe{G4100}{(G5723)}, but{G235} to them that believe not{G571}: but{G1161} prophesying{G4394} serveth not{G3756} for them that believe not{G571}, but{G235} for them which believe{G4100}{(G5723)}.
The F.O.G *
(22) So then tongues are for a miraculous-sign, not to those who believe but to unbelievers and prophecy is not for unbelievers but to those who believe.
The F.O.G Message *
Young's Literal Translation
so that the tongues are for a sign, not to the believing, but to the unbelieving; and the prophesy is not for the unbelieving, but for the believing,