Matsya Purana — The Strategy to Defeat Tāraka: Pārvatī’s Birth
विस्मृतानि च शस्त्राणि प्रादुर्भावं प्रपेदिरे प्रभावस्तीर्थमुख्यानां तदा पुण्यतमो ऽभवत् //
vismṛtāni ca śastrāṇi prādurbhāvaṃ prapedire prabhāvastīrthamukhyānāṃ tadā puṇyatamo 'bhavat //
Even weapons that had fallen into oblivion manifested again; and at that time the sanctifying power of the foremost tīrthas became supremely meritorious.
It does not directly describe pralaya; instead, it emphasizes extraordinary re-manifestation and heightened sacred efficacy, using “appearance again” as a sign of intensified tirtha-prabhāva (holy potency).
It supports the dharmic ideal that householders and rulers should seek purification and merit through recognized tirthas; honoring chief pilgrimage sites is presented as a powerful means to accrue puṇya and uphold social-religious order.
The ritual takeaway is the primacy of tīrtha-prabhāva—bathing, worship, and offerings performed at major tirthas are portrayed as especially merit-giving; no specific vastu/temple-measurement rule is stated in this verse.