Matsya Purana — Dynastic Genealogies: Paurava–Anu Lines
सत्पुत्रेण तु धर्मज्ञ कृतार्थो ऽहं यशस्विना मुक्त्वात्मानं ततो ऽसौ वै प्राप्तवान्ब्रह्मणः क्षयम् //
satputreṇa tu dharmajña kṛtārtho 'haṃ yaśasvinā muktvātmānaṃ tato 'sau vai prāptavānbrahmaṇaḥ kṣayam //
“O knower of dharma, through a virtuous and renowned son I have become fulfilled.” Having then relinquished the self (i.e., giving up the body), he indeed attained Brahman—reaching the state where all decay comes to an end.
This verse does not describe cosmic pralaya; it speaks of personal “ending” (kṣaya) as spiritual cessation of decay through attaining Brahman—an individual liberation theme rather than world-dissolution.
It elevates putradharma: raising a satputra (virtuous son) brings fulfilment to the householder and supports dharmic continuity, implying that social order and spiritual aims are upheld through ethical progeny and right conduct.
No Vāstu or temple-architecture rule is stated here; the ritual takeaway is the broader purāṇic idea that dharmic household life (including worthy offspring) supports one’s passage toward liberation.