Tithi-vicara
Determination of Tithi for Fasts, Parana, and Pitri Rites
तस्माद्विप्रा न कर्त्व्या विद्धाप्येकादशी तिथिः । यथा हंतिपुरा पुण्यं श्राद्धं च वृषलीपतिः ॥ ४४ ॥
tasmādviprā na kartvyā viddhāpyekādaśī tithiḥ | yathā haṃtipurā puṇyaṃ śrāddhaṃ ca vṛṣalīpatiḥ || 44 ||
ゆえに、婆羅門たちよ、ティティが「ヴィッダー」(他のティティに穿たれ混じった状態)であるとき、エーカーダシーは守ってはならない。シュードラ女の夫が一つの都の功徳を滅するように、彼はまたシュラーダの功徳をも損なうのである。
Sanatkumara
Vrata: Ekadashi
Primary Rasa: shanta
Secondary Rasa: raudra
It stresses that devotional merit depends on correct ritual timing: Ekādaśī must be observed on a “pure” tithi, because a viddhā (overlapped) Ekādaśī is treated as spiritually defective and merit-diminishing.
Ekādaśī is a core Vaiṣṇava vrata supporting Vishnu-bhakti; the verse teaches that devotion should be practiced with śāstra-guided discipline (tithi-śuddhi), not merely with intention.
It highlights calendrical decision-making (tithi-nirṇaya) tied to Jyotiṣa/Vedāṅga practice—determining when a tithi is ‘viddhā’ (pierced by another tithi) so the Ekādaśī observance is scheduled correctly.