BṚHADĀRAṆYAKA UPANISHAD · 1.3.17

अथात्मने ऽन्नाद्यम् आगायत् ।
यद् धि किञ्चान्नम् अद्यते ऽनेनैव तद् अद्यते ।
इह प्रतितिष्ठति ॥

athātmane ’nnādyam āgāyat ।
yad dhi kiñcānnam adyate ’nenaiva tad adyate ।
iha pratitiṣṭhati ॥

Then breath (vital), by singing, obtained for himself eatable food. For whatever food is eaten, is eaten by breath alone, and in it breath rests.

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