'Sign' in the Bible

Then some of the experts in the law along with some Pharisees answered him, "Teacher, we want to see a sign from you."

But he answered them, "An evil and adulterous generation asks for a sign, but no sign will be given to it except the sign of the prophet Jonah.

Now when the Pharisees and Sadducees came to test Jesus, they asked him to show them a sign from heaven.

A wicked and adulterous generation asks for a sign, but no sign will be given to it except the sign of Jonah." Then he left them and went away.

As he was sitting on the Mount of Olives, his disciples came to him privately and said, "Tell us, when will these things happen? And what will be the sign of your coming and of the end of the age?"

Then the sign of the Son of Man will appear in heaven, and all the tribes of the earth will mourn. They will see the Son of Man arriving on the clouds of heaven with power and great glory.

(Now the betrayer had given them a sign, saying, "The one I kiss is the man. Arrest him!")