Matsya Purana — Paurava Genealogy: Bharata
स तासु जनयामास पुत्रान्वै देववर्चसः तपसो ऽन्ते महातेजा जाता वृद्धस्य धार्मिकाः //
sa tāsu janayāmāsa putrānvai devavarcasaḥ tapaso 'nte mahātejā jātā vṛddhasya dhārmikāḥ //
He, endowed with divine radiance, begot sons upon those wives. At the culmination of his austerities, righteous children were born to the aged man of great splendor.
This verse does not discuss Pralaya; it focuses on lineage continuity—righteous offspring arising after austerity—supporting the Purana’s broader theme of cosmic and social order continuing through dynasties.
It frames progeny as aligned with dharma and earned through disciplined life (tapas), implying that household life and succession are ideally grounded in restraint, virtue, and responsibility rather than mere desire.
No Vāstu/temple rule is stated directly; the ritual implication is the Purāṇic motif that austerity (tapas) sanctifies life-events like begetting heirs, reinforcing a dharmic foundation for social institutions.