12:38Then certain of the scribes and of the Pharisees answered, saying, Master, we would see a sign from thee.

12:39But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas:

16:1The Pharisees also with the Sadducees came, and tempting desired him that he would shew them a sign from heaven.

16:4A wicked and adulterous generation seeketh after a sign; and there shall no sign be given unto it, but the sign of the prophet Jonas. And he left them, and departed.