Matsya Purana — Nārāyaṇa as Haṃsa in the Cosmic Ocean: Vedic Yajña-Puruṣa and Mārkaṇḍeya’s Vi...
मां पुत्रकामः प्रथमं पिता ते ऽङ्गिरसो मुनिः पूर्वमाराधयामास तपस्तीव्रं समाश्रितः //
māṃ putrakāmaḥ prathamaṃ pitā te 'ṅgiraso muniḥ pūrvamārādhayāmāsa tapastīvraṃ samāśritaḥ //
Formerly, desiring a son, your father—the sage Aṅgiras—first propitiated me, having undertaken severe austerities.
This verse is not about Pralaya; it highlights a dharmic mechanism for lineage-continuity—obtaining progeny through intense tapas and divine propitiation.
It supports the householder ideal of sustaining lineage responsibly: when progeny is sought, it should be pursued through disciplined vows, worship, and self-restraint rather than mere desire.
No Vāstu or temple-building rule is stated; the ritual takeaway is the efficacy of ārādhana (devotional propitiation) combined with tīvra-tapas as a sanctioned Puranic means to attain desired boons.