“Then the chief captain came near, and took him, and commanded him to be bound with two chains; and demanded who he was, and what he had done.”
King James Version (KJV)
21:33 Then the tribune - Having made his way through the multitude, came near and took him - And how many great ends of providence were answered by this imprisonment? This was not only a means of preserving his life, (after he had suffered severely for worldly prudence,) but gave him an opportunity of preaching the Gospel safely, in spite of all tumult, #Acts 22:22|, yea, and that in those places to which otherwise he could have had no access, #Acts 21:40|. And commanded him to be bound with two chains - Taking it for granted he was some notorious offender. And thus the prophecy of Agabus was fulfilled, though by the hands of a Roman.
Ac 21:33 Took him, and commanded [him] to be bound. The first thought of the commander was that the man seized was some great criminal. From Ac 21:38 we learned that he supposed Paul was an Egyptian rebel. Hence he ordered him bound.