Matsya Purana — Inquiry into Yayāti’s Story and the Kacha–Devayānī Episode
देवयान्यपि तं विप्रं नियमव्रतचारिणम् अनुगायन्ती ललना रहः पर्यचरत्तदा //
devayānyapi taṃ vipraṃ niyamavratacāriṇam anugāyantī lalanā rahaḥ paryacarattadā //
Then Devayānī too—singing after him—secretly attended upon that Brahmin, who was devoted to disciplined vows and observances.
Nothing directly—this verse belongs to a royal-genealogical narrative strand, describing Devayānī’s private conduct toward a vow-observing Brahmin, not cosmic creation or Pralaya.
Indirectly, it highlights the ideal of niyama and vrata (self-restraint and vowed discipline) as a valued dharmic quality; such restraint is a standard ethical benchmark in Purāṇic guidance for householders and rulers alike.
No Vāstu, temple-building, or ritual procedure is specified here; the technical focus is ethical—service/attendance (paricaryā) and disciplined observance (niyama-vrata).