Matsya Purana — Navagraha Sacrifice for Planetary Pacification and Prosperity
मेखलोपरि सर्वत्र अश्वत्थदलसंनिभम् वेदी च कोटिहोमे स्याद् वितस्तीनां चतुष्टयम् //
mekhalopari sarvatra aśvatthadalasaṃnibham vedī ca koṭihome syād vitastīnāṃ catuṣṭayam //
Above the surrounding girdle (mekhalā), everywhere it should resemble the leaf of the sacred aśvattha tree; and in the Koṭihoma rite, the altar (vedī) is to be four vitastis in measure.
This verse does not address Pralaya; it focuses on ritual-architectural prescription—how the vedi should look and its standard measurement in Koṭihoma.
It supports the householder/royal duty of performing properly regulated yajñas: the rite is not only devotional but must follow correct vedi form and standardized measures.
It prescribes the vedi’s design motif (aśvattha-leaf-like form above the mekhalā boundary) and fixes its size for Koṭihoma as four vitastis—key guidance for ritual layout and construction.