38 Then some 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 for a sign; but no sign will be 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 great fish, so the Son of Man will be three days and three nights in the heart of the earth.