Matsya Purana — Solar Dynasty Prelude: Vivasvān–Saṃjñā–Chāyā
विमानेनागमत्स्वर्गं पत्या सह मुदान्विता सावर्णो ऽपि मनुर् मेराव् अद्याप्यास्ते तपोधनः शनिस्तपोबलादाप ग्रहसाम्यं ततः पुनः //
vimānenāgamatsvargaṃ patyā saha mudānvitā sāvarṇo 'pi manur merāv adyāpyāste tapodhanaḥ śanistapobalādāpa grahasāmyaṃ tataḥ punaḥ //
Joyfully accompanied by her husband, she went to heaven in a celestial vimāna. And Sāvarṇi Manu too—abounding in ascetic merit—still remains on Mount Meru even today. By the power of his austerities, Śani (Saturn) attained equality of rank among the planets; thereafter the cosmic order continued accordingly.
It does not describe Pralaya directly; instead, it reflects post-crisis cosmic continuity—beings attain higher realms through merit, and planetary hierarchy is portrayed as adjustable through tapas within the ongoing cosmic order.
The verse emphasizes tapas and dharmic merit as true “wealth” (tapodhana). For kings and householders, it implies that disciplined vows, self-restraint, and righteous conduct can elevate one’s destiny—reaching svarga or enduring spiritual stature like Manu on Meru.
No direct Vāstu or temple rule is stated; the ritual takeaway is the Purāṇic principle that austerity and sustained observance (tapas) are efficacious and can confer cosmic-grade results, even influencing the status of grahas in narrative theology.