The legal experts and chief priests were watching Jesus closely and sent spies who pretended to be sincere. They wanted to trap him in his words so they could hand him over to the jurisdiction and authority of the governor.
References for Luke 20:20
They asked him, "Teacher, we know that you are correct in what you say and teach. You don't show favoritism but teach God's way as it really is.
Does the Law allow people to pay taxes to Caesar or not?"
Since Jesus recognized their deception, he said to them, "Caesar's," they replied.
"Show me a coin. Whose image and inscription does it have on it?"
References for Luke 20:24
He said to them, "Give to Caesar what belongs to Caesar and to God what belongs to God."
They couldn't trap him in his words in front of the people. Astonished by his answer, they were speechless.