Matsya Purana — Cosmic Architecture of Sun–Moon and the ‘Houses of the Gods’
आदित्यमेति सोमाच्च पुनः सौरेषु पर्वसु स्वभासा तुदते यस्मात् स्वर्भानुरिति स स्मृतः //
ādityameti somācca punaḥ saureṣu parvasu svabhāsā tudate yasmāt svarbhānuriti sa smṛtaḥ //
He approaches the Sun and again the Moon at the Sun’s parvans, the solar turning-points; and because he strikes (afflicts) them by his own radiance, he is remembered as Svarbhānu.
This verse is not about Pralaya; it explains an astral phenomenon—how Svarbhānu (Rāhu) periodically afflicts the Sun and Moon, i.e., the Purāṇic framing of eclipses.
Indirectly, it supports dharmic timekeeping: knowing eclipse-causing junctions (parvans) helps kings and householders schedule rites (snāna, dāna, śrāddha, vrata) and observe ritual cautions associated with graha-afflictions.
Architectural rules are not stated here; the ritual takeaway is that eclipses are tied to specific solar junctions (saureṣu parvasu), which are traditionally treated as potent times for purification and charitable giving.