Matsya Purana — Inquiry into Taraka’s Slaying and the Prelude to Guha
इत्युक्तः स तथोवाच तां पत्नीमतिदुःखिताम् दश वर्षसहस्राणि तपः कृत्वा तु लप्स्यसे //
ityuktaḥ sa tathovāca tāṃ patnīmatiduḥkhitām daśa varṣasahasrāṇi tapaḥ kṛtvā tu lapsyase //
Thus addressed, he then spoke to his wife, who was overwhelmed with sorrow: “After performing austerity (tapas) for ten thousand years, you shall indeed attain your desired goal.”
This verse does not discuss pralaya directly; it emphasizes tapas (austerity) over an immense timespan as a means to attain a desired end, reflecting the Purana’s broader theme that cosmic-scale results can follow sustained spiritual discipline.
It frames a dharmic response to grief within household life: endurance and disciplined spiritual practice (tapas) are presented as legitimate means to overcome suffering and achieve aims, aligning with Purāṇic ideals of self-control and perseverance.
No Vāstu or temple-architecture rule is stated here; the ritual takeaway is the centrality of tapas/vrata-like discipline as a sanctioned method for attaining outcomes in Purāṇic practice.