Matsya Purana — Vrata-Ṣaṣṭhī: The Sixty Sacred Vows
यस्तु नीलोत्पलं हैमं शर्करापात्रसंयुतम् एकान्तरितनक्ताशी समान्ते वृषसंयुतम् स वैष्णवं पदं याति लीलाव्रतमिदं स्मृतम् //
yastu nīlotpalaṃ haimaṃ śarkarāpātrasaṃyutam ekāntaritanaktāśī samānte vṛṣasaṃyutam sa vaiṣṇavaṃ padaṃ yāti līlāvratamidaṃ smṛtam //
Whoever offers a blue lotus together with a golden vessel containing sugar, observing a regimen of eating only at night on alternate days, and at the conclusion gives a bull as well—such a person attains the supreme Vaiṣṇava state. This observance is known as the Līlā-vrata.
This verse does not discuss Pralaya; it teaches a Vaishnava vow (vrata) involving specific offerings, dietary restraint, and a concluding gift, promising attainment of the Vaishnava state.
It frames dharma as disciplined observance: controlled eating (naktāśī, alternate days) and charitable giving (a concluding bull-gift). For householders—and especially rulers who model public virtue—it emphasizes self-restraint plus dāna as a path to religious merit and devotion to Viṣṇu.
The significance is ritual rather than architectural: prescribed items (blue lotus, sugar in a golden vessel), a specific fasting pattern, and an end-of-vow donation (bull) define the Līlā-vrata’s procedure and its promised spiritual result.