Luke 20:22

If our divine Saviour had returned them for answer, that they ought to give tribute to Cæsar, they would have accused him of being an enemy to the law; but if, on the contrary, he said it was not lawful, they would have accused him to Pilate as an enemy of the state. (Theophylactus) --- For there was then a great misunderstanding among the Jews: some, who wished to keep peace with the Romans, said that it was lawful; but the Pharisees denied it, and said: "The people of God ought to be exempt from such a tax. They were bound by the law to give tithes and first-fruits to God; therefore they ought not to be bound by human laws to give likewise tax to men who were heathens." (St. Jerome)