Tithi-vicara
Determination of Tithi for Fasts, Parana, and Pitri Rites
उपोष्या द्वादशी पुण्या पक्षयोरुभयोरपि । एष वो निर्णयः प्रोक्तो मया शास्त्रविनिर्णयात् ॥ ३१ ॥
upoṣyā dvādaśī puṇyā pakṣayorubhayorapi | eṣa vo nirṇayaḥ prokto mayā śāstravinirṇayāt || 31 ||
Le jeûne sacré de Dvādaśī doit être observé dans les deux quinzaines, la claire (śukla) comme la sombre (kṛṣṇa). Telle est la décision que je vous ai exposée, selon la détermination tirée des śāstra.
Narada
Vrata: Dvādaśī-vrata
Primary Rasa: shanta
Secondary Rasa: none
It establishes that observing the Dvādaśī fast is a consistently meritorious dharmic practice in both lunar fortnights, emphasizing reliability and scriptural authority in vrata observance.
By grounding the fasting rule in śāstra-vinirṇaya, it frames vrata as disciplined devotion—an orderly, scripture-aligned practice commonly associated with sustaining Viṣṇu-bhakti through tithi-based worship and restraint.
It highlights calendrical and ritual precision tied to tithi (lunar day) reckoning—practical dharma/kalpa-style decision-making used to determine when a vow like Dvādaśī should be observed across both pakṣas.