सूर्यरथनिर्णयः (चन्द्रस्य पक्षवृद्धिक्षयविधानम्)
संभृतं त्वर्धमासेन ह्य् अमृतं सूर्यतेजसा पानार्थममृतं सोमं पौर्णमास्यामुपासते
saṃbhṛtaṃ tvardhamāsena hy amṛtaṃ sūryatejasā pānārthamamṛtaṃ somaṃ paurṇamāsyāmupāsate
Được gom góp suốt nửa tháng nhờ ánh huy hoàng của Mặt Trời, cam lộ ấy chính là Soma. Vì muốn uống tinh chất bất tử đó, họ tôn thờ Soma vào đêm trăng tròn (Paurṇamāsī).
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.