BṚHADĀRAṆYAKA UPANISHAD · 6.1.9

चक्षुर् होच्चक्राम ।
तत् संवत्सरं प्रोष्यागत्योवाच -- कथम् अशकत मद् ऋते जीवितुम् इति ।
ते होचुः -- यथान्धा अपश्यन्तश् चक्षुषा प्राणन्तः प्राणेन वदन्तो वाचा शृण्वन्तः श्रोत्रेण विद्वांसो मनसा प्रजायमाना रेतसैवम् अजीविष्मेति ।
प्रविवेश ह चक्षुः ॥

cakṣur hoccakrāma ।
tat saṃvatsaraṃ proṣyāgatyovāca -- katham aśakata mad ṛte jīvitum iti ।
te hocuḥ -- yathāndhā apaśyantaś cakṣuṣā prāṇantaḥ prāṇena vadanto vācā śṛṇvantaḥ śrotreṇa vidvāṃso manasā prajāyamānā retasaivam ajīviṣmeti ।
praviveśa ha cakṣuḥ ॥

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

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)