'Sign' in the Bible

Then some of the scribes and Pharisees said to Him, “Teacher, we want to see a sign from You.”

But He answered and said to them, “An evil and adulterous generation craves for a sign; and yet no sign will be given to it but the sign of Jonah the prophet;

The Pharisees and Sadducees came up, and testing Jesus, they asked Him to show them a sign from heaven.

An evil and adulterous generation seeks after a sign; and a sign will not be given it, except the sign of Jonah.” And He left them and went away.

As He was sitting on the Mount of Olives, the disciples came to Him privately, saying, “Tell us, when will these things happen, and what will be the sign of Your coming, and of the end of the age?”

And then the sign of the Son of Man will appear in the sky, and then all the tribes of the earth will mourn, and they will see the Son of Man coming on the clouds of the sky with power and great glory.

Now he who was betraying Him gave them a sign, saying, “Whomever I kiss, He is the one; seize Him.”