38 Then certain of the scribes and of the Pharisees answered, saying, Master, we want to see a sign from you.
39 But He answered and said to them, An evil and adulterous generation seeks after a sign. And there shall be no sign given to it except the sign of the prophet Jonah.
40 For as Jonah was three days and three nights in the belly of the huge fish, so the Son of man shall be three days and three nights in the heart of the earth.