Narada Purana — Purva Bhaga, Shloka 39
Tithi-Nirṇaya for Vratas: Ekādaśī Rules, Saṅkrānti Punya-kāla, Eclipse Observances, and Prāyaścitta
पूर्वद्वये परेद्युः स्यात्संगवात्परतो मनीषिभिः । सद्यः कालः परेद्युः स्याज्ज्ञेयमेवं तिथिक्षये ॥ ३९ ॥
pūrvadvaye paredyuḥ syātsaṃgavātparato manīṣibhiḥ | sadyaḥ kālaḥ paredyuḥ syājjñeyamevaṃ tithikṣaye || 39 ||
เมื่อเกิดการขาดหายของตถิ (ตถิ-กษยะ) บัณฑิตกล่าวว่า ในสองช่วงแรกให้ถือ ‘วันรุ่งขึ้น’ (ปเรทยุห์); แต่หลังช่วงสังควะแล้ว ‘กาลทันที’ (สัทยะห์) ก็พึงเข้าใจว่าเป็นของวันรุ่งขึ้นเช่นกัน
Sanatkumara (teaching Narada)
Vrata: none
Primary Rasa: shanta
Secondary Rasa: adbhuta
FAQs
It safeguards dharma by ensuring vows and worship are performed at the correct sacred time; accurate kāla (time) is treated as an essential support for meritorious action.
Bhakti practices like vrata, pūjā, and upavāsa depend on proper tithi timing; the verse provides a rule so devotion is aligned with śāstric time-reckoning even during tithi-kṣaya.
Vedāṅga Jyotiṣa (astronomical calendrics): it gives a decision rule using saṅgava and day-divisions to assign ‘same-day time’ to the next day when a tithi is lost.