Matsya Purana — Inquiry into Yayāti’s Story and the Kacha–Devayānī Episode
*शौनक उवाच कचस्तु तं तथेत्युक्त्वा प्रतिजग्राह तद्व्रतम् आदिष्टं कविपुत्रेण शुक्रेणोशनसा स्वयम् //
*śaunaka uvāca kacastu taṃ tathetyuktvā pratijagrāha tadvratam ādiṣṭaṃ kaviputreṇa śukreṇośanasā svayam //
Śaunaka said: “Kaca, having replied ‘So be it,’ accepted that vow of discipline which was personally prescribed to him by Śukra—Uśanas himself, the son of Kavi.”
This verse does not address Pralaya directly; it highlights dharmic discipline—how a student accepts a prescribed vow—within a narrative episode.
It reinforces the Purāṇic ethic of obedience to rightful authority and disciplined observance: as a student follows a guru’s vrata, so a king or householder should uphold prescribed duties (niyama, vrata, and śāsana) with commitment.
No Vāstu or temple rule is stated here; the ritual significance is the acceptance of a vrata (formal observance) as instructed by an authoritative teacher.