38 Then certain of the scribes and Pharisees said to him, "Teacher, we want to see a sign from you."

39 But he answered them, "An evil and adulterous generation seeks after a sign, but no sign will be given it but the sign of Jonah the prophet.

40 For as Jonah was three days and three nights in the belly of the whale, so will the Son of Man be three days and three nights in the heart of the earth.