CHĀNDOGYA UPANISHAD · 1.11.9

अन्नम् इति होवाच ।
सर्वाणि ह वा इमानि भूतन्य् अन्नम् एव प्रतिहरमाणानि जीवन्ति ।
सैषा देवता प्रतिहारम् अन्वायत्ता ।
तां चेद् अविद्वान् प्रत्यहरिष्यो मूर्धा ते व्यपतिष्यत् तथोक्तस्य मयेति तथोक्तस्य मयेति ॥

annam iti hovāca ।
sarvāṇi ha vā imāni bhūtany annam eva pratiharamāṇāni jīvanti ।
saiṣā devatā pratihāram anvāyattā ।
tāṃ ced avidvān pratyahariṣyo mūrdhā te vyapatiṣyat tathoktasya mayeti tathoktasya mayeti ॥

He said: 'Food (anna). For all these beings live when they partake of food. This is the deity belonging to the pratihâra. If, without knowing that deity, you had sung your hymns, your head would have fallen off, after you had been warned by me.'

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