Matsya Purana — Maya’s Nectar-Reservoir in Tripura and the Revival of the Slain in the Tripur...
वापीं पीत्वासुरेन्द्राणां पीतवासा जनार्दनः नर्दमानो महाबाहुः प्रविवेश शरं ततः //
vāpīṃ pītvāsurendrāṇāṃ pītavāsā janārdanaḥ nardamāno mahābāhuḥ praviveśa śaraṃ tataḥ //
Having drunk up the reservoir of the lords of the Asuras, Janārdana—clad in yellow garments, roaring aloud, and mighty-armed—then entered that śara thicket.
This verse is not a Pralaya (cosmic dissolution) teaching; it depicts Vishnu’s martial, world-ordering act—draining an Asura reservoir—symbolizing the removal of hostile power rather than cosmic flooding or withdrawal.
It models decisive protection of order: like Janārdana neutralizing an enemy’s resources (the reservoir), a king is expected to curb adharma by strategic action, safeguarding people and restoring stability.
The term vāpī (tank/reservoir) is a key water-structure in Indic civic planning; while not a Vāstu rule here, it highlights the strategic and cultural importance of reservoirs—often central to temple-towns and ritual water management in Purāṇic contexts.