Bhashya
य एतं मन्त्रराजं नारसिंहमानुष्टुभं नित्यमधीते स मनु-ष्यान्देवान्नागान्यक्षान्ग्रहांस्तद्व्यतिरिक्तानन्यांश्च आकर्षयतीतिफलनिर्देशः ।द्विरभ्यासोऽध्यायसमाप्तिं द्योतयति ॥
In plain words
People, gods, nāgas, yakṣas, the planets — and anything beyond that list too: daily recitation of this king of mantras pulls all of it toward the one who recites. That is the fruit named here, and the doubled line, as always, marks the chapter's end.
Close to the Sanskrit
'Whoever recites this king of mantras, the Nārasiṃha anuṣṭubh, daily draws to himself human beings, gods, nāgas, yakṣas, planets, and, beyond these, whatever others there are' — this is the specification of the fruit. The double repetition signals the completion of the chapter.