Matsya Purana — The Greatness of Prayāga
ब्राह्मणे वास्ति यत्किंचिद् अब्राह्मम् इति वोच्यते एवं सर्वेषु भूतेषु ब्रह्म सर्वत्र पूज्यते //
brāhmaṇe vāsti yatkiṃcid abrāhmam iti vocyate evaṃ sarveṣu bhūteṣu brahma sarvatra pūjyate //
Whatever exists in a brāhmaṇa is spoken of as ‘not non‑Brahman’; in the same way, in all beings Brahman is to be revered everywhere.
It does not describe Pralaya directly; it teaches a metaphysical principle: Brahman pervades all beings, so reverence is due everywhere regardless of changing cosmic conditions.
It supports ethical governance and conduct: honor the brāhmaṇa and, more broadly, treat all beings with respect because Brahman is present in all—encouraging non-violence, restraint, and just behavior.
While no specific Vāstu rule is stated, the implication is ritual-spatial sanctity: since Brahman is everywhere, sacredness is not confined to one place—supporting purity, reverent handling of spaces, and respectful ritual attitude in temples and homes.