Matthew 12

38 Then some of the scribes and Pharisees said to Him, “Teacher, we want to see a sign from You.” 39 Jesus replied, “A wicked and adulterous generation demands a sign, but none will be given 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.