अहं वैश्वानरो भूत्वा प्राणिनां देहमाश्रितः ।
प्राणापानसमायुक्तः पचाम्यन्नं चतुर्विधम् ॥
ahaṁ vaiśvānaro bhūtvā prāṇināṁ deham āśritaḥ |
prāṇāpāna-samāyuktaḥ pacāmy annaṁ catur-vidham ||
(Śrīmad Bhagavad-gītā: 15.4)
[Kṛṣṇa:] “Becoming the digestive fire (vaiśvānara) situated in the body of living beings united with the prāṇa and apāna [vital-airs], I digest the four kinds of food.”