'Sign' in the Bible

Then answered certain of the scribes and Pharisees, saying, 'Teacher, we will to see a sign from thee.'

And he answering said to them, 'A generation, evil and adulterous, doth seek a sign, and a sign shall not be given to it, except the sign of Jonah the prophet;

And the Pharisees and Sadducees having come, tempting, did question him, to shew to them a sign from the heaven,

'A generation evil and adulterous doth seek a sign, and a sign shall not be given to it, except the sign of Jonah the prophet;' and having left them he went away.

And when he is sitting on the mount of the Olives, the disciples came near to him by himself, saying, 'Tell us, when shall these be? and what is the sign of thy presence, and of the full end of the age?'

and then shall appear the sign of the Son of Man in the heaven; and then shall all the tribes of the earth smite the breast, and they shall see the Son of Man coming upon the clouds of the heaven, with power and much glory;

And he who did deliver him up did give them a sign, saying, 'Whomsoever I will kiss, it is he: lay hold on him;'