Matsya Purana — The Attendant Hosts of the Sun and Moon: Monthly Gaṇas
एवं वसन्ति वै सूर्ये सप्तकास्ते चतुर्दश चतुर्दशेषु वर्तन्ते गणा मन्वन्तरेषु वै //
evaṃ vasanti vai sūrye saptakāste caturdaśa caturdaśeṣu vartante gaṇā manvantareṣu vai //
Thus, within the Sun dwell those sevenfold groups—fourteen in number; and these gaṇas, in sets of fourteen, take their turns through the successive Manvantaras.
It does not describe Pralaya directly; it maps orderly cosmic administration—solar hosts (gaṇas) rotating according to Manvantara time—implying continuity of cosmic governance between dissolutions.
Indirectly, it models dharmic order: just as gaṇas take turns by fixed cycles, rulers and householders are expected to follow prescribed duties and timings (kāla-dharma) rather than acting arbitrarily.
No explicit Vāstu rule is stated, but the verse supports ritual calendrics: solar order and Manvantara cycles underpin timing principles used in rites (e.g., solar-based observances) that often guide temple and ritual scheduling.