Taittiriya Upanishad 2.1.1

2.1.1

āūṃ saha nāvavatu /
saha nau bhunaktu /
saha vīryaṃ karavāvahai /
tejasvi nāvadhītamastu mā vidviṣāvahai /
āūṃ śāntiḥ śāntiḥ śāntiḥ //
āūṃ brahmavidāpnoti param /
tadeṣā 'bhuktā /
satyaṃ jñānamanantaṃ brahma /
yo veda nihitaṃ guhāyāṃ parame vyoman /
so 'śnute sarvān kāmān saha /
brahmaṇā vipaściteti //
tasmādvā etasmādātmana ākāśaḥ saṃbhūtaḥ /
ākāśādvāyuḥ /
vāyoragniḥ /
agnerāpaḥ /
adabhyaḥ pṛthivī /
pṛthivyā oṣadhayaḥ /
oṣadhībhyonnam /
annātpuruṣaḥ /
sa vā eṣa puruṣo 'nnnarasamayaḥ /
tasyedameva śiraḥ /
ayaṃ dakṣiṇaḥ pakṣaḥ /
ayamuttaraḥ pakṣaḥ /
ayamātmā /
idaṃ pucchaṃ pratiṣṭhā /
tadapyeṣa śloko bhavati // 1//
iti prathamo 'nuvākaḥ //

May He protect us both together. May He nourish us both together. May we both acquire strength together. Let our study be brilliant. May we not cavil at each other. Om! Peace! Peace! Peace!

The knower of Brahman attains the highest. Here is a verse uttering that very fact: "Brahman is truth, knowledge, and infinite. He who knows that Brahman as existing in the intellect, lodged in the supreme space in the heart, enjoys, as identified with the all-knowing Brahman, all desirable things simultaneously.

From that Brahman, which is the Self, was produced space. From space emerged air. From air was born fire. From fire was created water. From water sprang up earth. From earth were born the herbs. From the herbs was produced food. From food was born man. That man, such as he is, is a product of the essence of food: Of him this, indeed, is the head; this is the southern side; this is the northern side; this is the Self; this is the stabilising tail.

Here is a verse pertaining to that very fact: