Narada Purana — Purva Bhaga, Shloka 31
Tithi-Nirṇaya for Vratas: Ekādaśī Rules, Saṅkrānti Punya-kāla, Eclipse Observances, and Prāyaścitta
तत्र ग्राह्या सिनीवाली सायाह्नव्यापिनी तिथिः । अर्वाचीनक्षये चचैव सायाह्नव्यापिनी तथा ॥ ३१ ॥
tatra grāhyā sinīvālī sāyāhnavyāpinī tithiḥ | arvācīnakṣaye cacaiva sāyāhnavyāpinī tathā || 31 ||
அவ்விடத்தில் சாயாஹ்ணம் வரை நீளும் சீனிவாலி திதியே ஏற்க வேண்டும். அதுபோல திதி முன்பே முடிந்தாலும், சாயாஹ்ண-வியாப்தியை அடிப்படையாகவே அதை ஏற்க வேண்டும்.
Narada (teaching tithi-determination as part of ritual timing)
Vrata: Sinīvālī-Amāvāsyā determination (for śrāddha/Amāvāsyā rites)
Primary Rasa: shanta
Secondary Rasa: none
FAQs
It teaches that dharma is upheld by correct timing: a vow like Sinīvālī gains its intended merit when observed on the properly prevailing tithi (especially by late-afternoon pervasion).
Bhakti is expressed through disciplined observance; the verse shows that devotion is not only feeling but also careful adherence to vrata-vidhi (rules), aligning worship with sacred time.
Jyotiṣa Vedāṅga: the rule of sāyāhna-vyāpti (tithi pervasion into late afternoon) for deciding which tithi is ‘grāhya’ (authoritative) when a tithi ends earlier than expected.