'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."