Brihadaranyaka Upanishad 1.5.1

1.5.1

yatsaptānnāni medhayā tapasājanayatpitā ekamasya sādhāraṇaṃ dve devānabhājayat trīṇyātmane'kuruta paśubhya ekaṃ prāyacchat tasminsarvaṃ pratiṣṭhitaṃ yacca prāṇiti yacca na kasmāttāni na kṣīyante'dyamānāni sarvadā yo vaitāmakṣitiṃ veda so'nnamatti pratīkena sa devānapigacchati sa ūrjamupajīvati iti ślokāḥ

That the father produced seven kinds of food through meditation and rites (I shall disclose). One is common to all eaters. Two he apportioned to the gods. Three he designed for himself. And one he gave to the animals. On it rests everything—what lives and what does not. Why are they not exhausted, although they are always being eaten? He who knows this cause of their permanence, eats food with Pratīka (pre-eminence). He attains (identity with) the gods and lives on nectar. These are the verses.