Narada Purana — Purva Bhaga, Shloka 48
Tithi-Nirṇaya for Vratas: Ekādaśī Rules, Saṅkrānti Punya-kāla, Eclipse Observances, and Prāyaścitta
एकादशी द्वादशी च रात्रघिशेषे त्रयोदशी । द्वादशद्वादशीपुण्यं त्रयोदश्यां तु पारणे ॥ ४८ ॥
ekādaśī dvādaśī ca rātraghiśeṣe trayodaśī | dvādaśadvādaśīpuṇyaṃ trayodaśyāṃ tu pāraṇe || 48 ||
விரதம் ஏகாதசி–த்வாதசி வரை நீண்டு, த்வாதசியில் இரவின் சிறிதளவே மீதமிருந்து த்ரயோதசி தோன்றுமாறு இருந்தால்—த்ரயோதசியில் பாரணம் செய்தால் த்வாதசியின் புண்ணியம் கிடைக்கும்.
Sanatkumara (teaching Narada)
Vrata: Ekādaśī-vrata
Primary Rasa: shanta
Secondary Rasa: bhakti
FAQs
It defines a precise dharma rule: when tithi-boundary conditions make Dvādaśī effectively lapse into Trayodaśī, one should still preserve the sanctity of the observance by performing pāraṇa on Trayodaśī, thereby retaining Dvādaśī’s merit.
By emphasizing correct pāraṇa timing for Ekādaśī-related vows, it shows bhakti as disciplined worship—devotion expressed through careful observance of Viṣṇu-oriented vrata rules rather than mere sentiment.
Kalā/gaṇita-based tithi discernment (calendar computation) and ritual timing—applied knowledge akin to Vedāṅga Jyotiṣa used to decide when pāraṇa should be done under tithi overlap.