Verse
अहं वैश्वानरो भूत्वा प्राणिनां देहमाश्रितः ।प्राणापानसमायुक्तः पचाम्यन्नं चतुर्विधम् ॥
ahaṃ vaiśvānaro bhūtvā prāṇināṃ dehamāśritaḥprāṇāpānasamāyuktaḥ pacāmyannaṃ caturvidham
I, having become the flame of life, sustain the physical body of living creatures, and united with Prana and Apana, digest the four kinds of food.
Gītā 15·14