Matsya Purana — Origins of Gods and Beings: Daksha’s Progeny
ज्योतिष्मन्तस्तु ये देवा व्यापकाः सर्वतो दिशम् वसवस्ते समाख्यातास् तेषां सर्गं निबोधत //
jyotiṣmantastu ye devā vyāpakāḥ sarvato diśam vasavaste samākhyātās teṣāṃ sargaṃ nibodhata //
Those radiant gods who pervade all directions on every side are known as the Vasus; now understand the account of their creation and origin.
It points to creation (sarga), introducing the Vasus as a class of luminous, all-pervading deities whose origin will be described next; it is a cosmological setup rather than a direct pralaya statement.
Indirectly, it frames a worldview where cosmic order is maintained by defined divine functions; in the Matsya Purana, such classifications support dharma by reminding kings and householders that governance and conduct should align with an ordered cosmos.
No explicit Vastu or ritual rule is stated; however, identifying directional pervasion (sarvato diśam) resonates with later Vastu and ritual concepts where directions and their presiding powers are invoked for consecration and protective rites.