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

39 He answered them, "A wicked and adulterous generation seeks for a sign. But no sign will be given to it except the sign of the prophet Jonah.

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