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

39 And he answered and said to them, An evil and adulterous generation seeketh a sign, and there shall no sign be given it, but the sign of the prophet Jonah.

40 For as Jonah was three days and three nights in the belly of the great fish, so shall the Son of man be three days and three nights in the heart of the earth.