सूर्यरथनिर्णयः (चन्द्रस्य पक्षवृद्धिक्षयविधानम्)
स पौर्णमास्यां दृश्येत शुक्लः सम्पूर्णमण्डलः एवमाप्यायितं सोमं शुक्लपक्षे दिनक्रमात्
sa paurṇamāsyāṃ dṛśyeta śuklaḥ sampūrṇamaṇḍalaḥ evamāpyāyitaṃ somaṃ śuklapakṣe dinakramāt
នៅរាត្រីពោធិ៍ពេញចន្ទ (បូណ៌មាសី) គេឃើញព្រះចន្ទសភ្លឺ ស និងមានមណ្ឌលពេញលេញ។ ដូច្នេះ ក្នុងពាក់កណ្តាលខែភ្លឺ សោមៈត្រូវបានបំប៉នរៀងរាល់ថ្ងៃតាមលំដាប់។
Suta Goswami (narrating the Purana to the sages of Naimisharanya)
It establishes sacred lunar timing—especially Purnima and the Shukla Paksha—as ritually potent periods for Shiva-upasana, when offerings and vrata are performed in harmony with cosmic increase (āpyāyana).
Indirectly, it points to Shiva as Pati who upholds ṛta (cosmic order): the waxing of Soma occurs in a lawful sequence, reflecting the Lord’s governance of time (kāla) and nourishment (puṣṭi) within creation.
A calendrical discipline: observing the waxing-fortnight sequence up to Purnima—useful for planning Somavara/Purnima vrata, abhisheka, and mantra-japa aligned with lunar increase.