Matsya Purana — Yadu Lineage
ततस्ते दानवाः सर्वे प्रणिपत्याभिनन्द्य च वचनं जगृहुस्तस्य चिराभ्यासे न मोहिताः //
tataste dānavāḥ sarve praṇipatyābhinandya ca vacanaṃ jagṛhustasya cirābhyāse na mohitāḥ //
Then all those Dānavas, bowing down and offering their assent, accepted his words; through long practice they were not deluded by them.
This verse does not speak directly about Pralaya; it highlights a narrative moment of acceptance and mental steadiness—how beings respond to instruction without falling into delusion.
It implies a dharmic principle valued in the Matsya Purana: disciplined habituation (cirābhyāsa) and respectful receptivity to wise counsel—qualities expected of rulers and householders when following injunctions and guidance.
No explicit Vāstu or ritual procedure is mentioned; the closest takeaway is the ritual gesture of praṇipāta (prostration) as a marker of reverence and consent in traditional instruction contexts.