Acts 26:10 describes Paul's earlier persecution in Jerusalem; this verse shows the next step — journeying to Damascus with that same authority.

Acts 9:1 describes Saul 'breathing threats' and going to the high priest — a direct parallel to Paul's journey with authority and commission here.

Acts 9:2 gives the specific purpose: letters to synagogues to arrest believers — exactly the authority Paul claims in this verse.

Acts 22:5 also recounts receiving letters from the high priest and journeying to Damascus — a parallel account of this same event.

Acts 9:3 recounts the same Damascus road event, adding detail about the light — Paul here gives his own version.

Acts 22:6 is another account of Paul's Damascus road vision, retold in his defense speech.