Jossain upaniSat'issa (upanishadissa) muistaaksemme todetaan mm. seuraavaa:
annaM brahma elikäs: ruoka [on] brahma(n).
Näköjään ainakin taittiriiya (Tittiri-nimisen jäbän koulukunnan upanishad?):
(Addenda) Jep; Wiki:
The Taittirīya Upanishad (Devanagari: तैत्तिरीय उपनिषद्) is a Vedic era Sanskrit text, embedded as three chapters (adhyāya) of the Yajurveda. It is a mukhya (primary, principal) Upanishad, and likely composed about 6th century BCE.[1]
The Taittirīya Upanishad is associated with the Taittirīya school of the Yajurveda, attributed to the pupils of sage Tittiri (literally, "Partridge" [peltopyy?]).[2] It lists as number 7 in the Muktika canon of 108 Upanishads.
SECTION 2 –THE BODY AS BRAHMAN
annaM brahmeti [annaM brahma iti -- sidis] vyajAnAt . annAd.hdhyeva khalvimAni
bhutAni jAyante . annena jAtAni jIvanti .
annaM prayantyabhisa.nvishantIti . tadvij~nAya .
punareva varuNaM pitaramupasasAra .
adhIhi bhagavo brahmeti . ta{\m+}hovAcha .
tapasA brahma vijij~nAsasva . tapo brahmeti .
http://sanskritdocuments.org/doc_upanishhat/tait.itxHe realised that food is Brahman; for from food, verily, are these beings born; by food, when born, do they live; into food do they enter, do they merge. Having realized this, he approached his father again and said: "Venerable Sir, teach me Brahman." To him, the son, he said this: "Seek to know Brahman by means of austerities. For austerities are the means of knowing Brahman."
http://www.esamskriti.com/essay-chapters/Taittiriya-Upanishad~-Petal-9-1.aspx