Matsya Purana — Vrata-Ṣaṣṭhī: The Sixty Sacred Vows
वैशाखे पुष्पलवणं वर्जयित्वाथ गोप्रदः भूत्वा विष्णुपदे कल्पं स्थित्वा राजा भवेदिह एतत्कान्तिव्रतं नाम कान्तिकीर्तिफलप्रदम् //
vaiśākhe puṣpalavaṇaṃ varjayitvātha gopradaḥ bhūtvā viṣṇupade kalpaṃ sthitvā rājā bhavediha etatkāntivrataṃ nāma kāntikīrtiphalapradam //
In the month of Vaiśākha, having abstained from flowers and salt, and having become a giver of cows, one abides for a kalpa in Viṣṇu’s realm; and here (on earth) one becomes a king. This is called the Kānti-vrata, and it bestows the fruits of radiance and fame.
This verse is not about pralaya; it is a phalaśruti for a Vaiśākha vow (Kānti-vrata), describing merit leading to Viṣṇu’s realm and royal status.
It frames kingship as a fruit of dharma: self-restraint (dietary/ritual abstinence) and generosity (especially go-dāna) are presented as practices that elevate a householder and can yield sovereignty and lasting reputation.
The significance is ritual rather than architectural: it prescribes a Vaiśākha vrata involving abstention from flowers and salt and emphasizes cow-gifting as a key dāna supporting the vow’s promised results.