Ācāra-vidhi (Rules of Conduct) — Yudhiṣṭhira’s Inquiry and Bhīṣma’s Normative Catalogue
अपानप्राणयोर्मध्ये प्राणापानसमाहित: । समन्वितस्त्वधिष्ठानं सम्यक्पचति पावक:,अपान और प्राणके मध्यभाग (नाभि) में प्राण और अपान दोनोंका आश्रय लेकर स्थित हुआ जठरानल खाये हुए अन्नको भलीभाँति पचाता है
apānaprāṇayor madhye prāṇāpānasamāhitaḥ | samanvitastv adhiṣṭhānaṃ samyak pacati pāvakaḥ ||
Bharadvāja said: In the region between apāna and prāṇa—at the navel—the digestive fire, supported by and harmonized with both prāṇa and apāna, properly “cooks” (digests) the food that has been eaten.
भरद्वाज उवाच