Matsya Purana — Vrata-Ṣaṣṭhī: The Sixty Sacred Vows
महाफलानि यस्त्यक्त्वा चतुर्मासं द्विजातये हैमानि कार्त्तिके दद्याद् गोयुगेन समन्वितम् एतत् फलव्रतं नाम विष्णुलोकफलप्रदम् //
mahāphalāni yastyaktvā caturmāsaṃ dvijātaye haimāni kārttike dadyād goyugena samanvitam etat phalavrataṃ nāma viṣṇulokaphalapradam //
Whoever, having abstained from choice fruits for the four months, gives golden gifts to a twice-born (brāhmaṇa) in the month of Kārttika, together with a pair of cows—this is called the Phala-vrata (“Fruit-vow”), and it bestows the reward of attaining Viṣṇu’s world.
This verse does not discuss pralaya; it teaches a dharmic observance (vrata) and charitable giving (dāna) aimed at attaining Viṣṇu’s realm.
It frames a householder-style discipline: self-restraint during Cāturmāsya (abstaining from choice fruits) and meritorious giving in Kārttika—especially gifts to a dvija, accompanied by cows—presented as a direct path to religious merit and spiritual reward.
The significance is ritual rather than architectural: the verse defines a specific vrata (Phala-vrata) tied to Cāturmāsya and Kārttika, emphasizing regulated diet/renunciation and prescribed dāna (golden gifts and a pair of cows).