Taittirīya Upaniṣad 2.2.1

2.2.1

annādvai prajāḥ prajāyante /
yāḥ kāśca pṛthivīm̐śritāḥ /
atho annenaiva jīvanti /
athainadapi yantyantataḥ /
annam̐ hi bhūtānāṃ jyeṣṭham /
tasmāt sarvauṣadhamucyate /
sarvaṃ vai te 'nnamāpnuvanti /
ye 'nnaṃ brahmopāsate /
annam̐ hi bhūtānāṃ jyeṣṭham /
tasmāt sarvauṣadhamucyate /
annādbhūtāni jāyante /
jātānyannena vardhante /
adyate 'tti ca bhūtāni /
tasmādannaṃ taducyata iti /
tasmādvā etasmādannarasamayāt /
anyo 'ntara ātmā prāṇamayaḥ /
tenaiṣa pūrṇaḥ /
sa vā eṣa puruṣavidha eva /
tasya puruṣavidhatām /
anvayaṃ puruṣavidhaḥ /
tasya prāṇa eva śiraḥ /
vyāno dakṣiṇaḥ pakṣaḥ /
apāna uttaraḥ pakṣaḥ /
ākāśa ātmā /
pṛthivī pucchaṃ pratiṣṭhā /
tadapyeṣa śloko bhavati // 1//
iti dvitīyo 'nuvākaḥ //

From food, verily, creatures are produced,
Whatsoever [creatures] dwell on the earth.
Moreover by food, in truth, they live.
Moreover into it also they finally pass.
For truly, food is the chief of beings;
Therefore it is called a Panacea.
Verily, they obtain all food
Who worship Brahma as food.
For truly, food is the chief of beings;
Therefore it is called a Panacea.
From food created things are born.
By food, when born, do they grow up.
It both is eaten and eats things.
Because of that it is called food.

Verily, other than and within that one that consists of the essence of food is the self that consists of breath. By that this is filled. This, verily, has the form of a person. According to that one's personal form is this one with the form of a person. The in-breath (_prāṇa_) is its head; the diffused breath (_vyāna_), the right wing; the out-breath (_apāna_), the left wing; space, the body (_ātman_); the earth, the lower part, the foundation.

As to that there is also this verse:—