29 Those who were about to interrogate him withdrew immediately. The commander himself was alarmed when he realized that he had put Paul, a Roman citizen, in chains.

Read Acts 22:29 Using Other Translations

Then straightway they departed from him which should have examined him: and the chief captain also was afraid, after he knew that he was a Roman, and because he had bound him.
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.
The soldiers who were about to interrogate Paul quickly withdrew when they heard he was a Roman citizen, and the commander was frightened because he had ordered him bound and whipped.