Matsya Purana — Tripura Takes Refuge in the Ocean; Maya’s Hidden Nectar-Reservoir and the God...
या सामृतरसा गूढा वापी वै निर्मिता त्वया समाकुलोत्पलवना समीनाकुलपङ्कजा //
yā sāmṛtarasā gūḍhā vāpī vai nirmitā tvayā samākulotpalavanā samīnākulapaṅkajā //
That concealed well or pool you have built is filled with nectar-like essence; it is dense with lotus-groves, and its lotuses are thronged with fish.
It does not describe Pralaya directly; instead, it uses amṛta-like water imagery to present a life-sustaining, auspicious reservoir—an opposite motif to destructive flood themes.
Constructing and maintaining public waterworks (wells, ponds, stepwells) is a classic dharmic duty in Purāṇic ethics—supporting people, animals, and ritual needs through reliable, pure water.
The verse highlights a properly made vāpī (engineered water-reservoir) integrated with lotus-groves and aquatic life—key markers of an auspicious, functional sacred water feature in Vastu-oriented planning.