Matsya Purana — Vrata-Ṣaṣṭhī: The Sixty Sacred Vows
सकृद्वितानकं कुर्यात् तृतीयायां शिवालये समान्ते धेनुदो याति भवानीव्रतमुच्यते //
sakṛdvitānakaṃ kuryāt tṛtīyāyāṃ śivālaye samānte dhenudo yāti bhavānīvratamucyate //
On the third lunar day, one should set up a ceremonial canopy (vitāna) once in Śiva’s temple; at the conclusion, one should gift a cow. This is declared to be the Bhavānī-vrata.
This verse is not about pralaya; it prescribes a devotional vow (Bhavānī-vrata) performed in a Śiva temple, emphasizing ritual observance and concluding charity.
It frames dharma as disciplined worship plus dāna: a householder (and by extension a ruler) should complete religious observances properly and seal them with generosity—here, the meritorious gift of a cow.
The key ritual element is the vitānaka—setting up a ceremonial canopy/pavilion within the Śiva temple—indicating formal, temple-based worship procedures connected to vrata performance and its prescribed concluding gift.