CHĀNDOGYA UPANISHAD · 8.7.4

तौ ह प्रजापतिर् उवाच य एषो ऽक्षिणि पुरुषो दृष्यत एष आत्मेति होवाच ।
एतद् अमृतम् अभयम् एतद् ब्रह्मेति ।
अथ यो ऽयं भगवो ऽप्सु परिख्यायते यश् चायम् आदर्शे कतम एष इति ।
एष उ एवैषु सर्वेष्वन्न्तेषु परिख्यायत इति होवाच ॥

tau ha prajāpatir uvāca ya eṣo ’kṣiṇi puruṣo dṛṣyata eṣa ātmeti hovāca ।
etad amṛtam abhayam etad brahmeti ।
atha yo ’yaṃ bhagavo ’psu parikhyāyate yaś cāyam ādarśe katama eṣa iti ।
eṣa u evaiṣu sarveṣvannteṣu parikhyāyata iti hovāca ॥

Pragâpati said to them: 'The person that is seen in the eye, that is the Self. This is what I have said. This is the immortal, the fearless, this is Brahman.' They asked: 'Sir, he who is perceived in the water, and he who is perceived in a mirror, who is he?' He replied: 'He himself indeed is seen in all these.'

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)