Taittirīyopaniṣat 02.05

tad apy eṣa śloko bhavati। annād vai prajāḥ prajāyante। yāḥ kāś ca pṛthivīṃ śritāḥ। atho annenaiva jīvanti। atha enad api yanti antataḥ। annagaṃ hi bhūtānāṃ jyeṣṭham। tasmāt sarvauṣadham ucyate। sarvaṃ vai te 'nnam āpnuvanti। ye 'nnaṃ brahmopāsate। annagaṃ hi bhūtānāṃ jyeṣṭham। tasmāt sarvauṣadham ucyate। annād bhūtāni jāyante। jātāni annena vardhante। adyate iti ca bhūtāni। tasmād annaṃ tad ucyata iti ॥5॥

This verse declares: "From food, indeed, all creatures are born. All who dwell upon the earth live only by food, and at the end, they also go to it. The source of food is the eldest of beings; therefore, it is called the universal medicine. All those who worship food as Brahman attain all food. The source of food is the eldest of beings; therefore, it is called the universal medicine. From food, beings are born; by food, the born grow. Beings are what is eaten; therefore, it is called food".

Taittirīya Bhāshya 02.05

Lord Viṣṇu, the creator of beings and superior in qualities, is the one who, though unborn, is again born from food, because he is all-pervading. Those who possess clear discernment perceive Lord Keśava as the essence of food, as the essence of the body, as the universal medicine, as established in all parts of the body. Lord Hari is nourished by abundance and is always served by the abundant.

"sa eṣa bhagavān viṣṇur bhūtasraṣṭā guṇādhikaḥ। sa evānnāt punar jāto hy ajāto'pi yato vibhuḥ॥

"This very Lord Viṣṇu, the creator of beings and superior in qualities, is the one who, though unborn, is again born from food, because he is all-pervading.

annātmani śarīre'sau vyajyate suvivekibhiḥ। annasya sārabhūto'yaṃ śarīrasya ca keśavaḥ॥

Those who possess clear discernment perceive that Lord Keśava, the essence of food; is also the essence of the body.

annanāmā cānnasaṃsthaḥ śarīreṣu ca saṃsthitaḥ। attṛtvāt sarvalokānām annamity ucyate hariḥ॥

Lord Hari, who is known as 'anna', dwells in food and in all bodies; because He is the eater of all worlds, He is called 'food'.

upajīvyāś ca bhūtānām iti cānnaṃ janārdanaḥ। sa jyāyān sarvabhūtebhyas tasmāt sarvauṣadhaṃ smṛtaḥ। saṃsāre dahyamānānām āśrayatvāt sa auṣadham॥

Lord Janārdana is that food upon which all beings subsist; he is greater than all beings and therefore is remembered as the universal medicine; because he is the refuge for those who are suffering in the world, he is the medicine.

pracuraṃ maya ity uktaṃ pracurāttā yato hariḥ। pracurais sevayate nityam ato'nnamaya īritaḥ॥

I have called it 'abundant'; since Lord Hari is nourished by abundance, and is always served by the abundant; therefore he is called 'consisting of food' (annamaya).

dehasyaiva śirasyasya śiro viṣṇoḥ pratiṣṭhitam। bāhvoḥ pakṣau tathā madhye madhyaṃ paścāttanau tathā॥ pucchamityeṣa bhagavānaniruddhaḥ svayaṃ hariḥ॥"

Indeed, in this body, the head is established as the head of Lord Viṣṇu; the arms are the wings, the middle is the centre, and the back is the rear part; the tail is thus — this is Lord Aniruddha himself, as Lord Hari."