Bhagavad-gītā As It Is · Text 15.14
Krishna sustains, illuminates and gives remembrance
अहं वैश्वानरो भूत्वा प्राणिनां देहमाश्रित: ।
प्राणापानसमायुक्त: पचाम्यन्नं चतुर्विधम् ॥ १४ ॥
ahaṁ vaiśvānaro bhūtvā
prāṇināṁ deham āśritaḥ
prāṇāpāna-samāyuktaḥ
pacāmy annaṁ catur-vidham
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.
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