Matsya Purana — Prologue to the Matsya Purana and the Manu–Pralaya Rescue Narrative
ततः स कूपे तं मत्स्यं प्राहिणोद् रविनन्दनः यदा न माति तत्रापि कूपे मत्स्यः सरोवरे //
tataḥ sa kūpe taṃ matsyaṃ prāhiṇod ravinandanaḥ yadā na māti tatrāpi kūpe matsyaḥ sarovare //
Then the son of the Sun (Manu) placed that fish into a well. When the fish could not be contained even there in the well, he moved the fish to a lake.
It shows the prelude to Pralaya: the fish grows beyond normal limits, signaling a divine, world-scale event about to unfold rather than an ordinary incident.
Manu’s careful relocation of the fish models protection of the vulnerable and responsible stewardship—core ideals for rulers and householders in Purāṇic ethics.
No Vāstu or ritual procedure is taught directly here; the verse is narrative, highlighting graded relocation (well → lake) as the setting for the forthcoming Pralaya teaching.