'Appealed' in the Bible

Then Festus, when he had conferred with the council, answered, Thou hast appealed unto Caesar: unto Caesar shalt thou go.

But when Paul had appealed to be kept for the decision of the emperor, I commanded him to be kept till I should send him to Caesar.

But I found that he had committed nothing worthy of death: and as he himself appealed to the emperor I determined to send him.

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