Puṣkara-Śapatha Itihāsa (Agastya–Indra Dispute at the Tīrthas) | पुष्कर-शपथ-आख्यानम्
भीष्म उवाच अन्तरा सायमाशं च प्रातराशं च यो नर: । सदोपवासी भवति यो न भुंक्तेडन्तरा पुन:
bhīṣma uvāca antarā sāyamāśaṃ ca prātarāśaṃ ca yo naraḥ | sadopavāsī bhavati yo na bhuṅkte’ntarā punaḥ ||
பீஷ்மர் கூறினார்—மாலை உணவும் காலை உணவும் இடையில் எதையும் உண்ணாதவன் உண்மையில் எப்போதும் உபவாசம் கடைப்பிடிப்பவனே; ஏனெனில் இடைவேளையில் மீண்டும் உணவு எடுத்துக்கொள்ளான்।
भीष्म उवाच
Regular restraint—avoiding food between the evening and morning meals—is praised as a sustained form of fasting, emphasizing self-control and disciplined living as dharmic practice.
Bhishma, instructing on dharma and observances, defines a practical daily rule of eating: one who does not snack or eat again between the two main meals is regarded as continually observing a fast.