Matsya Purana — Kamalā-Saptamī Vow: Lotus Rite for Sūrya
अहोरात्रे गते पश्चाद् अष्टम्यां भोजयेद्द्विजान् यथाशक्त्यथ भुञ्जीत मांसतैलविवर्जितम् //
ahorātre gate paścād aṣṭamyāṃ bhojayeddvijān yathāśaktyatha bhuñjīta māṃsatailavivarjitam //
After a full day and night have passed, on the eighth lunar day (aṣṭamī) one should feed the twice-born (Brahmins). Then, according to one’s capacity, one may eat as well—avoiding meat and oil.
This verse is not about Pralaya; it prescribes vrata practice—after observing a full day-and-night, one honors Brahmins on Aṣṭamī and maintains dietary restraint.
It reflects the householder’s dharma of hospitality and ritual charity: completing a vow properly includes feeding qualified Brahmins and practicing self-control by avoiding rajasic/tamasic foods like meat and oil.
The significance is ritual (vrata-vidhi), not architectural: it outlines the sequence of observance—ahorātra completion, Aṣṭamī Brahmin-feeding, and a regulated, meat-and-oil-free meal for the observer.