Chandogya Upanishad 5.1

yo ha vai jyeṣṭhaṃ ca śreṣṭhaṃ ca veda jyeṣṭhaś ca ha vai śreṣṭhaś ca bhavati prāṇo vāva jyeṣṭhaś ca śreṣṭhaś ca

He who knows the oldest and the best becomes himself the oldest and the best. Breath indeed is the oldest and the best.

yo ha vai vasiṣṭhaṃ veda vasiṣṭho ha svānāṃ bhavati vāg vāva vasiṣṭhaḥ

He who knows the richest, becomes himself the richest. Speech indeed is the richest.

yo ha vai pratiṣṭhāṃ veda prati ha tiṣṭhaty asmiṃś ca loke 'muṣmiṃś ca cakṣur vāva pratiṣṭhā

He who knows the firm rest, becomes himself firm in this world and in the next. The eye indeed is the firm rest.

yo ha vai saṃpadaṃ veda saṃ hāsmai kāmāḥ padyante daivāś ca mānuṣāś ca śrotraṃ vāva saṃpat

He who knows success, his wishes succeed, both his divine and human wishes. The ear indeed is success.

yo ha vā āyatanaṃ vedāyatanaṃ ha svānāṃ bhavati mano ha vā āyatanam

He who knows the home, becomes a home of his people. The mind indeed is the home.

atha ha prāṇā ahaṃśreyasi vyūdire ahaṃ śreyān asmy ahaṃ śreyān asmīti

The five senses quarrelled together, who was the best, saying, I am better, I am better.

te ha prāṇāḥ prajāpatiṃ pitaram etyocuḥ bhagavan ko naḥ śreṣṭha iti tān hovāca yasmin va utkrānte śarīraṃ pāpiṣṭhataram iva dṛśyeta sa vaḥ śreṣṭha iti

They went to their father Pragâpati and said: 'Sir, who is the best of us?' He replied: 'He by whose departure the body seems worse than worst, he is the best of you.'

sā ha vāg uccakrāma sā saṃvatsaraṃ proṣya paryetyovāca katham aśakatarte maj jīvitum iti yathā kalā avadantaḥ prāṇantaḥ prāṇena paśyantaś cakṣuṣā śṛṇvantaḥ śrotreṇa dhyāyanto manasaivam iti praviveśa ha vāk

The tongue (speech) departed, and having been absent for a year, it came round and said: 'How have you been able to live without me?' They replied: 'Like mute people, not speaking, but breathing with the breath, seeing with the eye, hearing with the ear, thinking with the mind. Thus we lived.' Then speech went back.

cakṣur hoccakrāma tat saṃvatsaraṃ proṣya paryetyovāca katham aśakatarte maj jīvitum iti yathāndhā apaśyantaḥ prāṇantaḥ prāṇena vadanto vācā śṛṇvantaḥ śrotreṇa dhyāyanto manasaivam iti praviveśa ha cakṣuḥ

The eye (sight) departed, and having been absent for a year, it came round and said: 'How have you been able to live without me?' They replied: 'Like blind people, not seeing, but breathing with the breath, speaking with the tongue, hearing with the ear, thinking with the mind. Thus we lived.' Then the eye went back.

śrotraṃ hoccakrāma tat saṃvatsaraṃ proṣya paryetyovāca katham aśakatarte maj jīvitum iti yathā badhirā aśṛṇvantaḥ prāṇantaḥ prāṇena vadanto vācā paśyantaś cakṣuṣā dhyāyanto manasaivam iti praviveśa ha śrotram

The ear (hearing) departed, and having been absent for a year, it came round and said: 'How have you been able to live without me?' They replied: 'Like deaf people, not hearing, but breathing with the breath, speaking with the tongue, thinking with the mind. Thus we lived.' Then the ear went back.

mano hoccakrāma tat saṃvatsaraṃ proṣya paryetyovāca katham aśakatarte maj jīvitum iti yathā bālā amanasaḥ prāṇantaḥ prāṇena vadanto vācā paśyantaś cakṣuṣā śṛṇvantaḥ śrotreṇaivam iti praviveśa ha manaḥ

The mind departed, and having been absent for a year, it came round and said: 'How have you been able to live without me?' They replied: 'Like children whose mind is not yet formed, but breathing with the breath, speaking with the tongue, seeing with the eye, hearing with the ear. Thus we lived.' Then the mind went back.

atha ha prāṇa uccikramiṣan sa yathā suhayaḥ paḍvīśaśaṅkūn saṃkhided evam itarān prāṇān samakhidat taṃ hābhisametyocuḥ bhagavann edhi tvaṃ naḥ śreṣṭho 'si motkramīr iti

The breath, when on the point of departing, tore up the other senses, as a horse, going to start, might tear up the pegs to which he is tethered. They came to him and said: 'Sir, be thou (our lord); thou art the best among us. Do not depart from us!'

atha hainaṃ vāg uvāca yad ahaṃ vasiṣṭho 'smi tvaṃ tadvasiṣṭho 'sīti atha hainaṃ cakṣur uvāca yad ahaṃ pratiṣṭhāsmi tvaṃ tatpratiṣṭhāsīti

Then the tongue said to him: 'If I am the richest, thou art the richest.' The eye said to him: 'If I am the firm rest, thou art the firm rest.'

atha hainaṃ śrotram uvāca yad ahaṃ saṃpad asmi tvaṃ tatsaṃpad asīti atha hainaṃ mana uvāca yad aham āyatanam asmi tvaṃ tadāyatanam asīti

The ear said to him: 'If I am success, thou art success.' The mind said to him: 'If I am the home, thou art the home.'

na vai vāco na cakṣūṃṣi na śrotrāṇi na manāṃsīty ācakṣate prāṇā ity evācakṣate prāṇo hy evaitāni sarvāṇi bhavati

And people do not call them, the tongues, the eyes, the ears, the minds, but the breaths (prâna, the senses). For breath are all these.