दशशैवव्रतप्रश्नः — Inquiry into the Ten Principal Śaiva Vratas
त्रयोदश्यां सितायां तु कर्तव्यं निशि भोजनम् । असितायां तु भूतायां तत्र कार्यं शिवव्रतैः
trayodaśyāṃ sitāyāṃ tu kartavyaṃ niśi bhojanam | asitāyāṃ tu bhūtāyāṃ tatra kāryaṃ śivavrataiḥ
On the thirteenth lunar day (Trayodaśī) in the bright fortnight, one should take the meal at night. But when that thirteenth day falls in the dark fortnight, then the observances of Śiva’s vow should be performed on that occasion as prescribed.
Suta Goswami
Tattva Level: pashu
Shiva Form: Mahādeva
Significance: Connects tithi-dharma (trayodaśī) to Śiva-vrata performance, aligning personal discipline with temple calendar observances (esp. pradoṣa-related ethos).
Offering: naivedya
It teaches tithi-based discipline: aligning food and conduct with sacred lunar timing so that devotion (bhakti) becomes regulated, purifying, and fit for Shiva’s grace.
By prescribing when to eat and when to undertake Shiva-vrata observances, it supports outer worship of Saguna Shiva (often through Linga-puja) with inner restraint, making the offering and the worshiper ritually and mentally prepared.
Observe Shiva-vrata according to the tithi—practice night-discipline (niśā-ācāra), keep restraint in food, and accompany the vow with Shiva-japa (e.g., the Panchakshara), along with customary Shaiva marks like bhasma and Rudraksha where prescribed.