Bhagavad-gītā 15.14
BG 15.14
Open the full passageअहं वैश्वानरो भूत्वा प्राणिनां देहमाश्रितः । प्राणापानसमायुक्तः पचाम्यन्नं चतुर्विधम् ॥१४॥
Sanskrit
ahaṁ vaiśvānaro bhūtvā prāṇināṁ deham āśritaḥ prāṇāpāna-samāyuktaḥ pacāmy annaṁ catur-vidham
Translation
I am the fire of digestion in the bodies of all living entities, and I join with the air of life, outgoing and incoming, to digest the four kinds of foodstuff.