Acts 22:29

29 Immediately those who were about to examine him drew back from him; and the tribune also was afraid, for he realized that Paul was a Roman citizen and that he had bound him.

Acts 22:29 In-Context

27 The tribune came and asked Paul, "Tell me, are you a Roman citizen?" And he said, "Yes."
28 The tribune answered, "It cost me a large sum of money to get my citizenship." Paul said, "But I was born a citizen."
29 Immediately those who were about to examine him drew back from him; and the tribune also was afraid, for he realized that Paul was a Roman citizen and that he had bound him.
30 Since he wanted to find out what Paul was being accused of by the Jews, the next day he released him and ordered the chief priests and the entire council to meet. He brought Paul down and had him stand before them.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.