Narada Purana — Purva Bhaga, Shloka 12
Tithi-Nirṇaya for Vratas: Ekādaśī Rules, Saṅkrānti Punya-kāla, Eclipse Observances, and Prāyaścitta
सैव ग्राह्या मुनिश्रेष्ट नक्षत्रविहितव्रते । यद्यर्द्धरात्रघगयोर्व्यात्पं नक्षत्रं तु दिनद्वये ॥ १२ ॥
saiva grāhyā muniśreṣṭa nakṣatravihitavrate | yadyarddharātraghagayorvyātpaṃ nakṣatraṃ tu dinadvaye || 12 ||
முனிவரே! நக்ஷத்திரம் விதித்த விரதத்தில் அந்த நக்ஷத்திரமே ஏற்கத்தக்கது; அர்த்தராத்திரியைத் தாண்டி அது இரு நாட்களிலும் பரவினாலும் அதையே கொள்ள வேண்டும்.
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: bhakti
FAQs
It emphasizes dharma through precision in vrata observance: when a vow is tied to a nakṣatra, fidelity to the prescribed celestial marker preserves the intended merit (phala) of the rite.
By teaching careful observance of vow-timings, it supports disciplined devotional practice: correct ritual timing becomes a form of attentive service (sevā) offered with steadiness of mind.
Vedāṅga Jyotiṣa: it gives a rule for deciding the operative nakṣatra when it overlaps two civil days due to crossing midnight, guiding calendar-based ritual decisions.