'Appealed' in the Bible

Then Festus, when he had conferred with the council, answered, Hast thou appealed unto Caesar? unto Caesar shalt thou go.

But when Paul had appealed to be reserved unto the hearing of Augustus, I commanded him to be kept till I might send him to Caesar.

But when I found that he had committed nothing worthy of death, and that he himself hath appealed to Augustus, I have determined to send him.

Then said Agrippa unto Festus, This man might have been set at liberty, if he had not appealed unto Caesar.