How much had the Pharisees seen when they asked Jesus or a miracle to prove His authority? Had they seen the lame walk, the blind see, sins forgiven? If so, what sign were they asking for, and why did Jesus say He would give them only one sign—that of Jonah:
Matthew 12:39-40 Only an evil, adulterous generation would demand a miraculous sign; but the only sign I will give them is the sign of the prophet Jonah. For as Jonah was in the belly of the great fish for three days and three nights, so will the Son of Man be in the heart of the earth for three days and three nights.