Matthew 12:38-42
38 Then some of the scribes and Pharisees said to Him, “Teacher, we want to see a sign from You.”
39 But He answered and said to them, “An evil and adulterous generation craves for a sign; and yet no sign will be given to it but the sign of Jonah the prophet; 40 for just as Jonah was three days and three nights in the belly of the sea monster, so will the Son of Man be three days and three nights in the heart of the earth. 41 The men of Nineveh will stand up with this generation at the judgment, and will condemn it because they repented at the preaching of Jonah; and behold, something greater than Jonah is here. 42 The Queen of the South will rise up with this generation at the judgment and will condemn it, because she came from the ends of the earth to hear the wisdom of Solomon; and behold, something greater than Solomon is here.
Luke 11:29-32
29 As the crowds were increasing, He began to say, “This generation is a wicked generation; it seeks for a sign, and yet no sign will be given to it but the sign of Jonah. 30 For just as Jonah became a sign to the Ninevites, so will the Son of Man be to this generation. 31 The Queen of the South will rise up with the men of this generation at the judgment and condemn them, because she came from the ends of the earth to hear the wisdom of Solomon; and behold, something greater than Solomon is here. 32 The men of Nineveh will stand up with this generation at the judgment and condemn it, because they repented at the preaching of Jonah; and behold, something greater than Jonah is here.