Acts 22:25; Acts 22:29

25 But when they had stretched him out for the whips, Paul said to the centurion who was standing by, "Is it lawful for you to flog a man who is a Roman citizen and uncondemned?"

29 So those who were about to examine him withdrew from him immediately, and the tribune also was afraid, for he realized that Paul was a Roman citizen and that he had bound him.