Acts 22:24-26

24the commander ordered him to be brought into the barracks, stating that he was to be interrogated with a whip in order to learn why the people were shouting against him that way.

25But when they had stretched him out with the leather straps [in preparation for the whip], Paul said to the centurion who was standing by, “Is it legal for you to whip a man who is a Roman citizen and uncondemned [without a trial]?”

26When the centurion heard this, he went to the commander and said to him, “What are you about to do? This man is a Roman!”