Matsya Purana — Mahāgaurī’s Entry
तस्यै ददुस्तया चापि तत्पीतं क्रमशो जलम् पीते तु सलिले तस्मिंस् ततस्तस्मिन्सरोवरे //
tasyai dadustayā cāpi tatpītaṃ kramaśo jalam pīte tu salile tasmiṃs tatastasminsarovare //
They gave her water, and she, in turn, drank that water little by little. When that water had been drunk up, then (they placed her) in that lake.
It foreshadows the Pralaya (Great Flood) motif through a miracle: the fish rapidly outgrows each container of water, prompting repeated relocation—an omen of the vast waters to come and the divine presence behind the event.
It reflects attentive stewardship and compassion: Manu (as an ideal ruler/householder) protects a vulnerable being and responds appropriately as circumstances change—an ethical model of care, responsibility, and prudent action.
No direct Vastu or temple-architecture rule is stated; the practical takeaway is procedural—progressive relocation to larger water-bodies (from smaller vessel to a lake), emphasizing correct placement according to capacity and growth.