Matsya Purana — The Gods Seek Śiva’s Refuge: The Cosmic Chariot Prepared for the Burning of T...
शेषश्च भगवान्नागो ऽनन्तो ऽनन्तकरो ऽरिणाम् शरहस्तो रथं पाति शयनं ब्रह्मणस्तदा //
śeṣaśca bhagavānnāgo 'nanto 'nantakaro 'riṇām śarahasto rathaṃ pāti śayanaṃ brahmaṇastadā //
And Śeṣa—the blessed Nāga, Ananta, who consigns foes to endlessness—holding arrows in his hand, then protected the chariot, and likewise the couch of Brahmā.
It highlights the preservation-side of the cosmic cycle: Śeṣa/Ananta functions as a divine protector and support, guarding Brahmā’s resting-place and the cosmic “vehicle,” implying order is maintained even around dissolution and re-creation.
By analogy, it presents the ideal of guardianship: just as Ananta protects what sustains the world-order (Brahmā’s seat/rest), a king or householder must protect the foundations of dharma—institutions, sacred duties, and dependents—so stability persists through crisis.
While not a direct Vāstu rule, the verse uses royal/ritual imagery (ratha, śayana) to stress protected sacred space and sanctified “seats” of authority—ideas later mirrored in temple/altar planning where the deity’s seat and resting-places are treated as ritually guarded zones.