Matsya Purana — Cosmic Architecture of Sun–Moon and the ‘Houses of the Gods’
नवयोजनसाहस्रो विष्कम्भः सवितुः स्मृतः मण्डलं त्रिगुणं चास्य विस्तारो भास्करस्य तु //
navayojanasāhasro viṣkambhaḥ savituḥ smṛtaḥ maṇḍalaṃ triguṇaṃ cāsya vistāro bhāskarasya tu //
The diameter of Savitṛ (the Sun) is said to be nine thousand yojanas; and the Sun’s circular disc is three times that measure in its extent.
This verse does not describe pralaya directly; it gives a cosmographic measurement of the Sun (Savitṛ/Bhāskara) using yojanas, reflecting the Purana’s ordered structure of the cosmos.
Indirectly, it supports the Matsya Purana’s ideal of dharmic governance and household life grounded in right knowledge: understanding cosmic order (ṛta) is presented as part of traditional learning that underpins disciplined ritual life and righteous rule.
While not a Vāstu rule itself, the verse’s emphasis on exact proportion and measure parallels Vāstu-śāstra thinking; such cosmological measurements also inform ritual imagination of the solar disc (sūrya-maṇḍala) in worship and calendrical computation.