Tithi-vicara
Determination of Tithi for Fasts, Parana, and Pitri Rites
मूलं हि पितृतृप्त्यर्थं विज्ञेयं धर्मकांक्षिभिः । पूर्वविद्धा न कर्तव्या द्वितीया चाष्टमी तथा ॥ १० ॥
mūlaṃ hi pitṛtṛptyarthaṃ vijñeyaṃ dharmakāṃkṣibhiḥ | pūrvaviddhā na kartavyā dvitīyā cāṣṭamī tathā || 10 ||
Those who seek dharma should know that the rite connected with Mūla is meant for the satisfaction of the Pitṛs, the ancestors. Moreover, Dvitīyā and Aṣṭamī are not to be observed when they are pūrvaviddhā—when the tithi has already begun before the prescribed junction.
Narada
Vrata: Mūla (pitṛtṛpty-artha rite); Dvitīyā-vrata; Aṣṭamī-vrata (timing rule)
Primary Rasa: shanta
Secondary Rasa: bhakti
It links correct calendrical observance to pitṛ-tṛpti (ancestral satisfaction), teaching that dharma is fulfilled not only by intention but by proper ritual timing and rule-based performance.
While focused on ritual timing, it supports bhakti indirectly by emphasizing disciplined, scripture-aligned practice—an attitude that safeguards devotional acts from error and preserves their intended spiritual fruit.
It reflects Vedāṅga Jyotiṣa (sacred calendrics/astronomy): choosing the correct tithi condition (avoiding pūrvaviddhā) for specific observances like Dvitīyā and Aṣṭamī, and relating rites to nakṣatra-based considerations such as Mūla.