Maitrāyaṇīya Āraṇyaka 6.12

6.12

tapatyannenābhiṣiktāḥ pacantīme prāṇā agnirvā annenābhijvalatyannakāmenedaṃ
prakalpitaṃbrahmaṇā | ato'nnamātmetyupāsītetyevaṃ hyāha | annādbhūtāni
jāyante jātānyannena vardhante | adyate'tti ca
bhūtāni tasmādannaṃ taducyate

shines. Sprinkled with food, these vital breaths digest; Agni flares up with food. This was arranged by Brahman out of desire for food. Therefore one should meditate on food as the Self; so indeed it is said: From food beings are born; born, by food they grow. It is eaten and it eats beings; therefore it is called food.