Matsya Purana — The Kalyāṇa-Saptamī
भुक्त्वा च वेदविदुषे बिडालव्रतवर्जिते घृतपात्रं सकनकं सोदकुम्भं निवेदयेत् //
bhuktvā ca vedaviduṣe biḍālavratavarjite ghṛtapātraṃ sakanakaṃ sodakumbhaṃ nivedayet //
After eating, one should present to a Veda-knowing learned man—free from the “cat-like vow” (biḍāla-vrata, hypocritical conduct)—a vessel of ghee (ghṛta) together with gold, and a water-pot filled with water.
This verse does not address pralaya; it focuses on dharma through post-meal gifting (dāna) to a worthy Veda-knower, emphasizing purity of recipient and intention.
It frames a householder’s (and by extension a king’s) duty to support genuine Vedic learning through appropriate gifts—ghee, gold, and water—while carefully selecting a recipient who is not hypocritical (biḍālavrata-varjita).
The ritual significance is the prescribed dāna sequence after eating: offering a ghee vessel with gold and a water-filled pot, highlighting standard purāṇic gift-items used in rites rather than any Vāstu/architecture rule.