अहं वैश्वानरो भूत्वा प्राणिनां देहमाश्रितः | प्राणापानसमायुक्तः पचाम्यन्नं चतुर्विधम्
ahaṃ vaiśvānaro bhūtvā prāṇināṃ dehamāśritaḥ . prāṇāpānasamāyuktaḥ pacāmyannaṃ caturvidham
我化身为毗湿瓦那罗（Vaisvanara）之火，安住于众生体内，结合生命气息（Prana）与排泄气息（Apana），消化四种食物。
Taking the form of Vaisvanara and residing in the bodies of creatures, I, in association with Prana and Apana, digest the four kinds of food.
此节经文描述了主作为一切生物体内胃火（毗湿瓦那罗，Vaisvanara）的内在存在。主以胃火的形式，在生命气息（普拉那，Prana）和排泄气息（阿帕那，Apana）的协同作用下，消化四种不同类型的食物（咀嚼、吸吮、舔食、吞咽），从而维持生命。
The immanence of the Lord as the gastric fire in all living beings is described in this verse.Vaisvanara The fire that abides in the stomach. This fire is fanned by the bellows of the incoming and the outgoing breaths continuously and large antities of food are digested. Inside the wonderful laboratory of the stomach I digest the food by taking the form of this gastric fire.Four kinds of food (1) Food which has to be eaten by mastication (Bhakshyam). (2) That which has to be sucked in (Bhojyam). (3) That which has to be licked (Lehyam). (4) That which has to be devoured or swallowed (Choshyam). Another classification is as follows (1) Rice is PrithiviAnnam (solid food) for human beings. (2) Water is Apyannam (watery food) for birds like the Chataka. (3) Fire is Tejasannam (hot food) for certain creatures. (4) Air is Vayvannam (air as food) for serpents.अयमग्निर्वैश्वानरो योऽयमन्तः पुरुषः येनेदमन्नं पच्यते।।This fire which is within man and by which the food is digested is Vaisvanara. (Brihadaranyaka Upanishad 5.9.1)He who thinks or meditates and feels that the Vaisvanara fire is the eater? that the food eaten by the fire is the Soma (moon) and that the two together form AgniSoma is not contaminated by the impurities in the food. He who meditates before he takes his food that the whole world which is in the form of eater and eaten is made up of Agni and Soma? is not tainted by the evil arising from eating bad food.Repeat this verse daily before you take your food. You will be free from all taints of impurity in food.