Acts 25:21
But when Paul requested that his case be reviewed for a decision by Caesar, I ordered him to remain in custody until I could send him to Caesar."
Luke 2:1
Now it happened in those days that a decree was sent out from Caesar Augustus [the Emperor of the Roman Empire] requiring [people from] the whole empire to be registered [i.e., for taxation purposes].
Acts 25:10-11
Paul replied, "I am [already] standing before a court of Caesar's authority, where I deserve to be tried. I have done nothing wrong to the Jews, as you very well know.
Acts 26:32-1
Then Agrippa said to Festus, "This man could have been released if he had not appealed [his case] to Caesar."
2 Timothy 4:16
At my first defense [Note: Paul here refers to his initial hearing before the Roman court] no one supported me, but everyone deserted me. May it not be held against them.