This can be stated as a direct quotation. AT: "But Festus said, 'Paul is a prisoner in Caesarea, and I myself will soon return there.'" (See: [[rc://en/ta/man/translate/figs-quotations]])
The phrase "he said" can be moved to the beginning of the sentence. AT: "Then he said, 'Therefore, those who are able to go to Caesarea should go there with us" (See: [[rc://en/ta/man/translate/writing-quotations]])