Paul said that tongues was a sign gift.
Actually... a sign to the unbeliever. Why?
1 Corinthians 14:20-22
Brothers and sisters, stop thinking like children.
In regard to evil be infants, but in your thinking be adults.
In the Law it is written:
“With other tongues
and through the lips of foreigners
I will speak to this people,
but even then they will not listen to me,
says the Lord.”
Tongues, then, are a sign, not for believers but for unbelievers;
prophecy, however, is not for unbelievers but for believers.
Today, no such thing is possible.
For it was to be a sign to the Jewish unbelievers. "This people."
“With other tongues
and through the lips of foreigners
I will speak to this people,
but even then they will not listen to me,
says the Lord.”
It was a sign as the plagues were when presented to Pharaoh.
Pharaoh refused to listen and would not believe.
Many get that part wrong.