Adhyaya 84: शिवव्रतकथनम्
Uma–Maheshvara Vrata, Shula-dana, and Month-wise Ekabhakta Vrata
पौर्णमास्याममावास्यां वर्षमेकमतन्द्रिता उपवासरता नारी नरो ऽपि द्विजसत्तमाः
paurṇamāsyāmamāvāsyāṃ varṣamekamatandritā upavāsaratā nārī naro 'pi dvijasattamāḥ
ໃນວັນເພັງເດືອນ ແລະ ວັນເດືອນດັບ ຕະຫຼອດໜຶ່ງປີເຕັມ ໂດຍບໍ່ປະມາດ, ນາງ—ຫຼືຊາຍກໍດີ ໂອ ຜູ້ເກີດສອງຄັ້ງຜູ້ປະເສີດ—ຜູ້ມຸ່ງໝັ້ນໃນອຸປະວາສ (ອົດອາຫານ) ດ້ວຍຄວາມຕື່ນຮູ້ ແລະ ພັກຕິ, ຈະເໝາະສົມຮັບພຣະກະຣຸນາທີ່ປົດພາຊະຂອງປະຊຸ ໂດຍການປະພຶດມັ່ນຄົງຕໍ່ ພະປະຕິ ພຣະສິວະ.
Suta Goswami
It prescribes a year-long discipline of fasting on Pūrṇimā and Amāvāsyā as a purificatory vrata that supports Śiva-pūjā and ripens the devotee for Śiva’s anugraha (grace).
Śiva is implied as Pati—the liberating Lord—whose grace is approached through steadiness (atandritā) and self-restraint, weakening pāśa (bondage) that constrains the paśu (individual soul).
Upavāsa as a vrata: periodic fasting on lunar junctions (full and new moon) for a year, a tapas-oriented practice aligned with Shaiva observance and preparatory to deeper Pāśupata discipline.