Matsya Purana — Dynastic Genealogies: Paurava–Anu Lines
उशीनरस्य पुत्रास्तु तासु जाताः कुलोद्वहाः तपसा ते तु महता जाता वृद्धस्य धार्मिकाः //
uśīnarasya putrāstu tāsu jātāḥ kulodvahāḥ tapasā te tu mahatā jātā vṛddhasya dhārmikāḥ //
From those wives, sons were born to Uśīnara—upholders of the family line. Through great austerity (tapas), they became the righteous offspring of the elder (ancestor), renowned for their dharma.
This verse does not discuss pralaya; it focuses on dynastic continuity—how righteous heirs arise in a royal lineage through tapas and dharma.
It frames ideal rulership and household continuity as grounded in dharma and disciplined living (tapas), implying that legitimate heirs and stable kingdoms arise from ethical restraint and religious merit.
No Vāstu or temple-ritual rule is stated here; the ritual emphasis is indirect—tapas (austerity) is presented as a source of moral and spiritual authority in a lineage.