Matsya Purana — Yadu Lineage
सो ऽवतीर्णो महीं देवः प्रविष्टो मानुषीं तनुम् मोहयन्सर्वभूतानि योगात्मा योगमायया //
so 'vatīrṇo mahīṃ devaḥ praviṣṭo mānuṣīṃ tanum mohayansarvabhūtāni yogātmā yogamāyayā //
That divine Lord descended upon the earth and entered a human body; being the very essence of Yoga, He bewildered all beings through His power of Yoga-māyā.
It does not describe pralaya directly; it explains the avatāra principle—God can descend and, through Yoga-māyā, govern perception and events that later frame cosmic transitions such as deluge narratives.
It implies that worldly perception can be shaped by māyā; therefore kings and householders should ground decisions in dharma and disciplined yoga-like discernment rather than being carried away by delusion.
No explicit Vāstu or ritual procedure is stated; the takeaway is theological—ritual and iconography presume the Lord’s capacity to take forms (including human), which underlies later temple-image (pratimā) logic in the Purāṇa.