Narada Purana — Purva Bhaga, Shloka 14
द्वादशमासेषु अष्टमी-व्रत-कथनम्
Account of the Aṣṭamī Vow Across the Twelve Months
ततो द्विजान् भोजयित्वा परेऽह्नि स्वयमप्युत । भुक्त्वा समापयेदद्व्रतं संततिवर्धनम् ॥ १४ ॥
tato dvijān bhojayitvā pare'hni svayamapyuta | bhuktvā samāpayedadvrataṃ saṃtativardhanam || 14 ||
その後、翌日に、まず二度生まれ（dvija）すなわちバラモンたちに食を施し、行者自身もまた食すべし。かくして食後、この子孫と家系を増し育てる誓戒（ヴラタ）を正しく結願せよ。
Narada (teaching the vrata-vidhi within the Purva Bhaga narrative)
Vrata: Saṃtati-vardhana vrata (described as ‘this vow that promotes progeny’)
Primary Rasa: shanta
Secondary Rasa: bhakti
FAQs
It teaches that a vow is completed not merely by personal austerity but by dharmic closure—especially honoring the twice-born through feeding—so the merit becomes socially and spiritually well-directed.
Though procedural, it reflects bhakti through reverent service (sevā) and offering—treating the observance as an act of sacred dedication rather than private gain.
Kalpa (ritual procedure) is implicit: the timing ('the next day'), the act of dvija-bhojana, and the formal completion (samāpana) of the vrata.