Bṛhadāraṇyaka Upaniṣad ("Great Forest Teaching") 1.1

1.1.1

bṛhadāranyakopaniṣat — pūrṇamadaḥ pūrṇamidaṃ pūrṇātpūrṇamudacyate pūrṇasya pūrṇamādāya pūrṇamevāvaśiṣyate — śāntiḥ śāntiḥ śāntiḥ — uṣā vā aśvasya medhyasya śiraḥ | sūryaścakṣurvātaḥ prāṇo vyāttamagnirvaiśvānaraḥ saṃvatsara ātmāśvasya medhyasya | dyauḥ pṛṣṭhamantarikṣamudaraṃ pṛthivī pājasyaṃ diśaḥ pārśve avāntaradiśaḥ parśava ṛtavo'ṅgāni māsāścārdhamāsāśca parvāṇyahorātrāṇi pratiṣṭhā nakṣatrāṇyasthīni nabho mām̐sāni | ūvadhyam̐ sikatāḥ sindhavo gudā yakṛcca klomānaśca parvatā oṣadhayaśca vanaspatayaśca lomānyudyanpūrvārdho nimlocañjaghanārdho yadvijṛmbhate tadvidyotate yadvidhūnute tatstanayati yanmehati tadvarṣati vāgevāsya vāk

Verily the dawn is the head of the horse which is fit for sacrifice, the sun its eye, the wind its breath, the mouth the Vaisvânara fire, the year the body of the sacrificial horse. Heaven is the back, the sky the belly, the earth the chest, the quarters the two sides, the intermediate quarters the ribs, the members the seasons, the joints the months and half-months, the feet days and nights, the bones the stars, the flesh the clouds. The half-digested food is the sand, the rivers the bowels, the liver and the lungs the mountains, the hairs the herbs and trees. As the sun rises, it is the forepart, as it sets, the hindpart of the horse. When the horse shakes itself, then it lightens; when it kicks, it thunders; when it makes water, it rains; voice is its voice.

1.1.2

aharvā aśvaṃ purastānmahimānvajāyata tasya pūrve samudre yoniḥ rātrirenaṃ paścānmahimānvajāyata tasyāpare samudre yoniretau vā aśvaṃ mahimānāvabhitaḥ saṃbabhūvatuḥ | hayo bhūtvā devānavahadvājī gandharvānarvāsurānaśvo manuṣyānsamudra evāsya bandhuḥ samudro yoniḥ

Verily Day arose after the horse as the (golden) vessel, called Mahiman (greatness), which (at the sacrifice) is placed before the horse. Its place is in the Eastern sea. The Night arose after the horse as the (silver) vessel, called Mahiman, which (at the sacrifice) is placed behind the horse. Its place is in the Western sea. Verily, these two vessels (or greatnesses) arose to be on each side of the horse.
As a racer he carried the Devas, as a stallion the Gandharvas, as a runner the Asuras, as a horse men. The sea is its kin, the sea is its birthplace.

1.1.2.p1

iti prathamādhyāye prathamaṃ brāhmaṇam