BṚHADĀRAṆYAKA UPANISHAD · 6.1.8

वाग् घोच्चक्राम ।
सा संवत्सरं प्रोष्यागत्योवाच -- कथम् अशकत मद् ऋते जीवितुम् इति ।
ते होचुः -- यथाकला अवदन्तो वाचा प्राणन्तः प्राणेन पश्यन्तश् चक्षुषा शृण्वन्तः श्रोत्रेण विद्वांसो मनसा प्रजायमाना रेतसैवम् अजीविष्मेति ।
प्रविवेश ह वाक् ॥

vāg ghoccakrāma ।
sā saṃvatsaraṃ proṣyāgatyovāca -- katham aśakata mad ṛte jīvitum iti ।
te hocuḥ -- yathākalā avadanto vācā prāṇantaḥ prāṇena paśyantaś cakṣuṣā śṛṇvantaḥ śrotreṇa vidvāṃso manasā prajāyamānā retasaivam ajīviṣmeti ।
praviveśa ha vāk ॥

The tongue (speech) 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 unto people, not speaking with the tongue, but breathing with breath, seeing with the eye, hearing with the ear, knowing with the mind, generating with seed. Thus we have lived.' Then speech entered in.

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