Matsya Purana — Kailasa
परस्परेण द्विगुणा धर्मतः कामतो ऽर्थतः हेमकूटस्य पृष्ठे तु सर्पाणां तत्सरः स्मृतम् //
paraspareṇa dviguṇā dharmataḥ kāmato 'rthataḥ hemakūṭasya pṛṣṭhe tu sarpāṇāṃ tatsaraḥ smṛtam //
In that region, the fruits of merit are said to be doubled in comparison with other holy places—whether sought for dharma, for kāma (desire), or for artha (worldly prosperity). On the back-slope of Hemakūṭa, that lake is remembered as belonging to the Nāgas (serpent beings).
This verse is not about pralaya; it is a tirtha-phalashruti statement, describing amplified spiritual and worldly results obtained at a specific sacred lake near Hemakūṭa associated with the Nāgas.
It frames pilgrimage and sacred-site observance as a legitimate pursuit for all three aims—dharma, artha, and kāma—so a householder (and a king guiding public religion) may support tirtha-visits and vows as part of ethical, prosperity-oriented life within dharma.
The architectural detail is geographic: a lake on Hemakūṭa’s back-slope identified as a Nāga-tīrtha; ritually, it implies that bathing, offerings, or vows performed there are believed to yield “double” results compared to other sites.