tatra — there; ekaḥ — one; puruṣaḥ — person; rājan — O King (Parīkṣit); āgataḥ — did come; apūrva — never before; darśanaḥ — whose appearance; vijñāpitaḥ — announced; bhagavate — to the Supreme Lord; pratīhāraiḥ — by the doorkeepers; praveśitaḥ — made to enter.