Matsya Purana — Procedure for Going to Prayaga and the Greatness of the Ganga
ततः स्वर्गात्परिभ्रष्टः क्षीणकर्मा दिवश्च्युतः सुवर्णमणिमुक्ताढ्यकुले जायेत रूपवान् //
tataḥ svargātparibhraṣṭaḥ kṣīṇakarmā divaścyutaḥ suvarṇamaṇimuktāḍhyakule jāyeta rūpavān //
Then, having fallen away from heaven—his merit exhausted, cast down from the celestial world—he is born in a family rich in gold, jewels, and pearls, endowed with beauty.
This verse does not discuss pralaya; it teaches karma-phala: after enjoying heaven, one returns to rebirth when merit is exhausted.
It underscores that righteous action (dharma/puṇya) yields heavenly enjoyment and then favorable human birth—motivating kings and householders to sustain ethical conduct, charity, and duty rather than relying on temporary heavenly rewards.
No vastu or temple-architecture rule is stated here; the ritual takeaway is the broader puranic principle that ritual merit is finite and culminates in return to human birth after svarga is spent.