'Sign' in the Bible

Then He was accosted by some of the Scribes and of the Pharisees who said, "Teacher, we wish to see a sign given by you."

"Wicked and faithless generation!" He replied, "they clamour for a sign, but none shall be given to them except the sign of the Prophet Jonah.

Here the Pharisees and Sadducees came to Him; and, to make trial of Him, they asked Him to show them a sign in the sky.

A wicked and faithless generation are eager for a sign; but none shall be given to them except the sign of Jonah." and He left them and went away.

Afterwards He was on the Mount of Olives and was seated there when the disciples came to Him, apart from the others, and said, "Tell us when this will be; and what will be the sign of your Coming and of the Close of the Age?"

Then will appear the Sign of the Son of Man in the sky; and then will all the nations of the earth lament, when they see the Son of Man coming on the clouds of the sky with great power and glory.

Now the betrayer had agreed upon a sign with them, to direct them. He had said, "The one whom I kiss is the man: lay hold of him."

The Pharisees followed Him and began to dispute with Him, asking Him for a sign in the sky, to make trial of Him.

Heaving a deep and troubled sigh, He said, "Why do the men of to-day ask for a sign? In solemn truth I tell you that no sign will be given to the men of to-day."

"Tell us, When will these things be? and what will be the sign when all these predictions are on the point of being fulfilled?"

Others, to put Him to the test, asked Him for a sign in the sky.

Now when the crowds came thronging upon Him, He proceeded to say, "The present generation is a wicked generation: it requires some sign, but no sign shall be given to it except that of Jonah.

For just as Jonah became a sign to the men of Nineveh, so the Son of Man will be a token to the present generation.

Making a sign therefore to him, Simon Peter said, "Tell us to whom he is referring."

Then, at a sign from the Governor, Paul answered, "Knowing, Sir, that for many years you have administered justice to this nation, I cheerfully make my defence.

Before, not after. And he received circumcision as a sign, a mark attesting the reality of the faith-righteousness which was his while still uncircumcised, that he might be the forefather of all those who believe even though they are uncircumcised--in order that this righteousness might be placed to their credit;

This shows that the gift of tongues is intended as a sign not to those who believe but to unbelievers, but prophecy is intended not for unbelievers but for those who believe.