Matsya Purana — The Rite of the Jaggery-Cow
विशोकद्वादशी चैषा पुण्या पापहरा शुभा यामुपोष्य नरो याति तद्विष्णोः परमं पदम् //
viśokadvādaśī caiṣā puṇyā pāpaharā śubhā yāmupoṣya naro yāti tadviṣṇoḥ paramaṃ padam //
This Viśokā-Dvādaśī is indeed meritorious, auspicious, and a remover of sins. By observing a fast (upavāsa) on it, a person attains the supreme abode of Viṣṇu.
This verse does not discuss pralaya or cosmology; it teaches a devotional vow (Dvādaśī fasting) whose fruit is liberation-like attainment of Viṣṇu’s supreme abode.
It frames vrata-observance (fasting on an auspicious Dvādaśī) as a practical dharma for householders and rulers alike—purifying sin and orienting life toward a Vaiṣṇava goal (paramaṃ padam).
No vāstu or temple-building rule is stated; the ritual takeaway is the efficacy of upavāsa (fasting) on Viśokā-Dvādaśī as a sin-destroying, auspicious observance.