Matsya Purana — Cosmic Architecture of Sun–Moon and the ‘Houses of the Gods’
सौरश्चाङ्गिरसो वक्रो विज्ञेया मन्दचारिणः तेभ्यो ऽधस्तात्तु चत्वारः पुनश्चान्ये महाग्रहाः //
sauraścāṅgiraso vakro vijñeyā mandacāriṇaḥ tebhyo 'dhastāttu catvāraḥ punaścānye mahāgrahāḥ //
Saura and Āṅgirasa, and Vakra as well, are to be understood as slow-moving planets. Below them, however, there are again four other great planets, and then other great planets besides.
This verse does not discuss pralaya directly; it belongs to a cosmological–astronomical description that orders the grahas by position and motion, a framework often used in Purāṇas to describe the structured universe that persists across cycles.
Indirectly, it supports dharma through timekeeping: knowing the grahas and their motions underpins calendrical reckoning (tithi, nakṣatra, muhūrta) used by kings and householders for state rituals, yajñas, consecrations, and other dharmic observances.
The verse itself is not about Vāstu, but graha-order and planetary motion are used in ritual planning—selecting auspicious timings and, in some traditions, aligning temple and altar rites with celestial calculations derived from Jyotiṣa.