Matsya Purana — Procedure for Going to Prayaga and the Greatness of the Ganga
ततः स्वर्गात्परिभ्रष्टः क्षीणकर्मा दिवश्च्युतः उर्वशीसदृशीनां तु कन्यानां लभते शतम् //
tataḥ svargātparibhraṣṭaḥ kṣīṇakarmā divaścyutaḥ urvaśīsadṛśīnāṃ tu kanyānāṃ labhate śatam //
Then, having fallen from heaven—his merit exhausted and cast down from the celestial realm—he obtains a hundred maidens resembling Urvaśī.
This verse does not discuss pralaya; it teaches karmaphala doctrine—heavenly enjoyment is temporary and ends when merit is exhausted, leading to descent and further experience in another realm or birth.
It underscores that pleasures gained by merit are impermanent; therefore a king or householder should pursue dharma and disciplined conduct rather than treating svarga as the final goal, cultivating lasting spiritual aims alongside righteous prosperity.
No Vastu or temple-architecture rule is stated here; the verse is focused on the fruit of karma—specifically the post-svarga outcome when accumulated merit runs out.