Matsya Purana — Inquiry into Yayāti’s Story and the Kacha–Devayānī Episode
न हि वेद स तां विद्यां यां काव्यो वेद वीर्यवान् संजीवनीं ततो देवा विषादमगमन्परम् //
na hi veda sa tāṃ vidyāṃ yāṃ kāvyo veda vīryavān saṃjīvanīṃ tato devā viṣādamagamanparam //
For he did not know that knowledge which the mighty Kāvya (Śukrācārya) knew—the life-restoring Sañjīvanī. Therefore the gods fell into profound despondency.
This verse does not address pralaya; it highlights a different Purāṇic theme—esoteric knowledge (Sanjīvanī) that can restore life, affecting the balance of power among gods and their opponents.
Indirectly, it underscores a Matsya Purāṇa ethic: knowledge (vidyā) and capable counsel determine success more than force alone—an ideal relevant to kingship (seeking competent advisors) and household life (pursuing learning and right guidance in crisis).
No Vāstu or temple-architecture rule appears here; the ritual takeaway is the prominence of mantra-vidyā—specialized sacred knowledge (like Sanjīvanī) that functions as a potent remedial practice within Purāṇic tradition.