Matsya Purana — Cosmography of Jambūdvīpa: Varṣas
तस्य पीत्वा फलरसं संजीवन्ति समायुतम् तस्य माल्यवतः पार्श्वे पूर्वे पूर्वा तु गण्डिका द्वात्रिंशच्च सहस्राणि तत्रापि शतमुच्यते //
tasya pītvā phalarasaṃ saṃjīvanti samāyutam tasya mālyavataḥ pārśve pūrve pūrvā tu gaṇḍikā dvātriṃśacca sahasrāṇi tatrāpi śatamucyate //
Having drunk its fruit-juice, they are restored to life in full vigor. To the east of Mount Mālyavat, further eastward, lies a place (or river) called Gaṇḍikā; its extent is said to be thirty-two thousand, and there too an additional hundred is mentioned.
This verse does not directly discuss Pralaya; it emphasizes sacred geography and a rejuvenating substance (fruit-juice) that restores life, a common Puranic motif of extraordinary potency in holy regions.
Indirectly, it supports the Purāṇic ethic of pilgrimage and honoring sacred places: a householder or king is encouraged to protect and patronize tīrthas and support dharmic travel and charity connected with such regions.
No explicit Vāstu or temple rule appears here; the ritual takeaway is the sanctity of specific locales (Mālyavat–Gaṇḍikā) and the belief in spiritually/physically revitalizing offerings or substances associated with them.