Dvādaśī-vrata: Month-by-month Viṣṇu Worship and the Year-End Udyāpana
अत्यन्गिष्टोमयज्ञस्य फलमष्टगुणं लभेत् । वैशाखशुक्लद्वादश्यामुपोष्य मधुसूदनम् ॥ ४९ ॥
atyangiṣṭomayajñasya phalamaṣṭaguṇaṃ labhet | vaiśākhaśukladvādaśyāmupoṣya madhusūdanam || 49 ||
Ai nhịn ăn (upavāsa) vì đức Madhusūdana vào ngày Śukla Dvādaśī (mồng mười hai trăng sáng) của tháng Vaiśākha sẽ được phước báo gấp tám lần quả của tế lễ Aṅgiṣṭoma.
Sanatkumara (in dialogue with Narada)
Vrata: Dvādaśī-vrata (Vaiśākha Śukla Dvādaśī upavāsa for Madhusūdana)
Primary Rasa: bhakti
Secondary Rasa: vira
It elevates Vaiṣṇava vrata (fasting for Madhusūdana on Vaiśākha Śukla Dvādaśī) as a highly efficacious dharmic act, declaring its merit to surpass even major śrauta sacrifices.
The verse frames devotion to Viṣṇu through disciplined worship (upavāsa and remembrance of Madhusūdana) as a direct means to attain great spiritual merit, emphasizing bhakti-oriented practice over ritual complexity.
It relies on calendrical and ritual precision—identifying the lunar tithi (Śukla Dvādaśī) in the month of Vaiśākha—reflecting applied Jyotiṣa (Vedāṅga astrology/astronomy) for correct vrata timing.