Ellicott's Commentary for English Readers - Matthew 16:4
(4) The sign of the prophet Jonas.—See Note on Matthew 12:39. As given by St. Mark, the answer was a more absolute refusal, “No sign” (i.e., none of the kind that was demanded) “shall be given to this generation.” read more
John Dummelow's Commentary on the Bible - Matthew 16:1-28
St. Peter’s great Confession1-4. A sign from heaven demanded (Mark 8:11 cp. Luke 11:16: see on Matthew 12:38). 1. Pharisees.. Sadducees] An unnatural and unholyalliance of men whose only bond of union was hatred of Jesus. The Sadducees had probably been sent from Jerusalem by the chief priests, but some regard them as the same as the Herodians mentioned by St. Mark, and, therefore, Galileans.From heaven] Jewish superstition held that the demons could work signs on earth, but that only God could... read more