Matthew 22:15-22, Mark 12:13-17, Luke 20:20-26.
Pharisees and Herodians tried to trap Jesus, asking if it was right to pay taxes to Caesar.
Jesus who knew their plan already said "You hypocrites, why are you trying to trap me? Show me the coin used for paying the tax. Whose portrait is this? and whose inscription?" "Caesar's." they replied. Then Jesus said to them, "Give to Caesar what is Caesar's, and to God what is God's." By this answer they were amazed and lost the ways to trap Jesus.