Matsya Purana — Saptamī Sacred Bath and the Mṛtavatsābhiṣeka Rite for Pacifying Misfortune an...
सदानेन विधानेन दीर्घायुरभवन्नरः संवत्सराणामयुतं शशास पृथिवीमिमाम् //
sadānena vidhānena dīrghāyurabhavannaraḥ saṃvatsarāṇāmayutaṃ śaśāsa pṛthivīmimām //
By constantly following this prescribed method, the man became long-lived, and he ruled this very earth for ten thousand years.
This verse does not discuss Pralaya; it emphasizes the fruit (phala) of sustained observance—longevity and stable rule on earth.
It presents disciplined adherence to prescribed dharma as the foundation for long life and effective governance—implying that a ruler’s legitimacy and success rest on consistent observance of ordained conduct.
No specific Vastu or iconographic rule is stated; the verse functions as a results-statement (phalaśruti) that the prescribed ordinance, likely ritual-ethical in nature, yields longevity and prosperous rule.