31 See how much worse than the Jews the Arians are. They asked whether He thought that the right of tribute should be given to Cæsar; these want to give to Cæsar the right of the Church. But as these faithless ones follow their author, so also let us answer as our Lord and Author has taught us. For Jesus seeing the wickedness of the Jews said to them: Why do you tempt Me? Show Me a penny. When they had given it, He said: “Whose image and superscription has it?” They answered and said: Cæsar's. And Jesus says to them: “Render unto Cæsar the things that are Cæsar's, and to God the things that are God's.” So, too, I say to these who oppose me: Show me a penny. Jesus sees Cæsar's penny and says: Render unto Cæsar the things that are Cæsar's, and unto God the things that are God's. Can they in seizing the basilicas of the church offer Cæsar's penny?
Source: Sermon against Auxentius (New Advent)