Bṛhadāraṇyaka Upaniṣad ("Great Forest Teaching") 5.5

5.5.1

āpa evedamagra āsustā āpaḥ satyamasṛjanta satyaṃ brahma brahma prajāpatiṃ prajāpatirdevām̐ste devāḥ satyamevopāsate tadetatñyakṣaram̐ satyamiti sa ityekamakṣaraṃ tītyekamakṣaraṃ yamityekamakṣaraṃ prathamottame akṣare satyaṃ madhyato'nṛtaṃ tadetadanṛtamubhayataḥsatyena parigṛhītam̐ satyabhūyameva bhavati naivaṃ vidvām̐samanṛtam̐ hinasti

In the beginning this (world) was water. Water produced the true, and the true is 'Brahman. Brahman produced Pragâpati, Pragâpati the Devas (gods). The Devas adore the true (satyam) alone. This satyam consists of three syllables. One syllable is sa, another t(i), the third yam. The first and last syllables are true, in the middle there is the untrue. This untrue is on both sides enclosed by the true, and thus the true preponderates. The untrue does not hurt him who knows this.

5.5.2

tadyattatsatyamasau sa ādityo ya eṣa etasminmaṇḍale puruṣo yaścāyaṃ dakṣiṇe'kṣanpuruṣastāvetāvanyonyasminpratiṣṭhitau raśmibhireṣo'sminpratiṣṭhitaḥ prāṇairayamamuṣmin sa yadotkramiṣyanbhavati śuddhamevaitanmaṇḍalaṃ paśyati nainamete raśmayaḥ pratyāyanti

Now what is the true, that is the Âditya (the sun), the person that dwells in yonder orb, and the person in the right eye. These two rest on each other, the former resting with his rays in the latter, the latter with his prânas (senses) in the former. When the latter is on the point of departing this life, he sees that orb as white only, and those rays (of the sun) do not return to him.

5.5.3

ya eṣa etasminmaṇḍale puruṣastasya bhūritiśira ekam̐ śira ekametadakṣaraṃ bhuva iti bāhū dvau bāhū dve ete akṣare svariti pratiṣṭhā dve pratiṣṭhe dve ete akṣare tasyopaniṣadahariti hanti pāpmānaṃ jahāti ca ya evaṃ veda

Now of the person in that (solar) orb Bhûh is the head, for the head is one, and that syllable is one; Bhuvah the two arms, for the arms are two, and these syllables are two; Svar the foot, for the feet are two, and these syllables are two. Its secret name is Ahar (day), and he who knows this destroys (hanti) evil and leaves (gahâti) it.

5.5.4

yo'yaṃ dakṣi-ṇe'kṣanpuruṣastasya bhūriti śira ekam̐ śira ekametadakṣaraṃ bhuva iti bāhū dvau bāhū dve ete akṣare svariti pratiṣṭā dve pratiṣṭhe dve ete akṣare tasyopaniṣadahamiti hanti pāpmānaṃ jahāti ca ya evaṃ veda

Of the person in the right eye Bhûh is the head, for the head is one, and that syllable is one; Bhuvah the two arms, for the arms are two, and these syllables are two; Svar the foot, for the feet are two, and these syllables are two. Its secret name is Aham (ego), and he who knows this, destroys (hanti) evil and leaves (gahâti) it.

5.5.4.p1

iti pañcamādhyāye pañcamaṃ brāhmaṇam