सूर्यरथनिर्णयः (चन्द्रस्य पक्षवृद्धिक्षयविधानम्)
संभृतं त्वर्धमासेन ह्य् अमृतं सूर्यतेजसा पानार्थममृतं सोमं पौर्णमास्यामुपासते
saṃbhṛtaṃ tvardhamāsena hy amṛtaṃ sūryatejasā pānārthamamṛtaṃ somaṃ paurṇamāsyāmupāsate
സൂര്യതേജസ്സാൽ അർദ്ധമാസത്തിൽ സമാഹരിക്കപ്പെട്ട ആ അമൃതം തന്നെയാണ് സോമൻ. ആ അമൃതം പാനം ചെയ്യുന്നതിനായി പൗർണ്ണമാസി രാത്രിയിൽ അവർ സോമനെ ഉപാസിക്കുന്നു.
Suta Goswami
It frames Soma (the Moon and Soma-substance) as amṛta gathered through cosmic law, making Paurṇamāsī a ritually potent time to offer and contemplate purity before worshiping Mahadeva as Pati, the giver of grace.
By pointing to amṛta sustained through the Sun–Moon order, it implies Shiva-tattva as the transcendent Pati who governs and sanctifies cosmic processes, turning worldly cycles into a means for the pashu to move beyond pasha.
Paurṇamāsī upāsanā of Soma—full-moon worship/observance—supporting vrata-like discipline and inner purification aligned with Shaiva practice.