Matsya Purana — Uma’s Austerities and the Slaying of the Deceiver Asura ĀḌi
हरेण सूदितं दृष्ट्वा स्त्रीरूपं दानवेश्वरम् अपरिच्छिन्नतत्त्वार्था शैलपुत्र्यै न्यवेदयत् //
hareṇa sūditaṃ dṛṣṭvā strīrūpaṃ dānaveśvaram aparicchinnatattvārthā śailaputryai nyavedayat //
Seeing the lord of the Dānavas—who had assumed a woman’s form—slain by Hari, and being unable to discern the true reality of what had occurred, she reported the matter to Śailaputrī, the Daughter of the Mountain.
This verse does not address pralaya directly; it highlights divine intervention (Hari’s slaying of a Dānava leader) and the ensuing report to the Goddess, within a mythic conflict narrative.
Indirectly, it models dharmic conduct: when facts are unclear (aparicchinna-tattvārtha), one should report to a rightful authority/guardian for discernment and guidance—an ethical pattern applicable to governance and household decision-making.
No Vāstu or temple-architecture rule is stated here; the ritual takeaway is the prominence of Śailaputrī/Devī as an authority to whom significant events are formally conveyed, reflecting Purāṇic devotional and reporting conventions.