Acts 16:38

16:38 The police officers reported these words to the magistrates. They were frightened when they heard Paul and Silas were Roman citizens

Acts 22:29

22:29 Then those who were about to interrogate him stayed away from him, and the commanding officer was frightened when he realized that Paul was a Roman citizen and that he had had him tied up.

Acts 24:25

24:25 While Paul was discussing righteousness, self-control, and the coming judgment, Felix became frightened and said, “Go away for now, and when I have an opportunity, I will send for you.”