Bhagavad Gita 15.14

Becoming the fire of life, I pass into their bodies and, uniting with the vital streams of Prāṇa and Apāna, I digest the various kinds of food.

अहं वैश्वानरो भूत्वा प्राणिनां देहमाश्रितः।प्राणापानसमायुक्तः पचाम्यन्नं चतुर्विधम्॥

ahaṃ vaiśvānaro bhūtvā prāṇināṃ dehamāśritaḥ|prāṇāpānasamāyuktaḥ pacāmyannaṃ caturvidham||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).