Mark 12:13-15

Then they sent some of the Pharisees and Herodians to Jesus in order to trap Him into making a statement [that they could use against Him]. [Matt 22:15-22; Luke 20:20-26] They came and said to Him, “Teacher, we know that You are truthful and have no personal bias toward anyone; for You are not influenced by outward appearances or social status, but in truth You teach the way of God. Is it lawful [according to Jewish law and tradition] to pay the poll-tax to [Tiberius] Caesar, or not? Should we pay [the tax] or should we not pay?” But knowing their hypocrisy, He asked them, “Why are you testing Me? Bring Me a coin (denarius) to look at.”