Matsya Purana — The Attendant Hosts of the Sun and Moon: Monthly Gaṇas
पीतं पञ्चदशाहं च रश्मिनैकेन भास्करः आपूरयन्ददौ तेन भागं भागमहःक्रमात् //
pītaṃ pañcadaśāhaṃ ca raśminaikena bhāskaraḥ āpūrayandadau tena bhāgaṃ bhāgamahaḥkramāt //
For fifteen days, Bhāskara (the Sun), drawing up (the waters) with a single ray, fills them; and by that very process he apportions the day in successive portions—part by part—according to the order of the days.
This verse is not describing Pralaya directly; it explains a cosmological mechanism of timekeeping—how the Sun’s ray “draws up” and apportions time in an ordered, day-by-day sequence.
By emphasizing orderly time (ahah-krama), it supports dharmic life structured around correct calendrical rhythms—daily rites, fortnightly observances, and seasonal duties that kings and householders are expected to maintain.
Ritually, the verse underpins timing: solar order and the fortnight (fifteen days) are foundational for scheduling vrata, śrāddha, and temple services; it does not give a direct Vāstu rule but supports ritual calendrics used in temple administration.