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 BC.
The Taittirīya Upanishad is associated with the Taittirīya school of the Yajurveda, attributed to the pupils of sage Vaishampayana. It lists as number 7 in the Muktika canon of 108 Upanishads.
The Taittirīya Upanishad is the seventh, eighth and ninth chapters of Taittirīya Āraṇyaka, which are also called, respectively, the Śikṣāvallī, the Ānandavallī and the Bhṛguvallī. This Upanishad is classified as part of the “black” Yajurveda, with the term “black” implying “the un-arranged, motley collection” of verses in Yajurveda, in contrast to the “white” (well arranged) Yajurveda where Brihadaranyaka Upanishad and Isha Upanishad are embedded.
The Upanishad includes verses that are partly prayers and benedictions, partly instruction on phonetics and praxis, partly advice on ethics and morals given to graduating students from ancient Vedic gurukula-s (schools), partly a treatise on allegory, and partly philosophical instruction.
The book contains the original Upanishad and the Bengali translation of Shankaracharya’s commentary on it with detailed notes.