Matsya Purana — Soma
समागम्य लवौ द्वौ तु मध्याह्नान्निपतन्रविः प्रतिपच्छुक्लपक्षस्य चन्द्रमाः सूर्यमण्डलात् //
samāgamya lavau dvau tu madhyāhnānnipatanraviḥ pratipacchuklapakṣasya candramāḥ sūryamaṇḍalāt //
When two lava-units of time converge and midday is reached, the Sun begins to decline; and on Pratipad (the first lunar day) of the bright fortnight, the Moon is seen departing from the Sun’s orb, that is, emerging from conjunction.
This verse is not about Pralaya; it describes observable solar–lunar timing—midday solar decline and the Moon’s emergence from conjunction at the start of the bright fortnight (pratipad).
It supports dharmic timekeeping: householders and rulers schedule vows, donations, and rites by correct tithi/fortnight reckoning—especially recognizing pratipad and midday transitions for ritual propriety.
Ritually, it aids muhurta selection: identifying pratipad (bright fortnight day 1) and midday (madhyāhna) markers helps time pūjā, vrata starts, and offerings in line with Matsya Purana calendrical guidance.