The Taittirīya Upanishad is a Vedic era Sanskrit text, embedded as three chapters (adhyāya) of the Yajurveda. It is a mukhya Upanishad, and likely composed about 6th century BC.

The Yajurveda is the Veda primarily of prose mantras for worship rituals. An ancient Vedic Sanskrit text, it is a compilation of ritual-offering formulas that were said by a priest while an individual performed ritual actions such as those before the yajna fire. Yajurveda is one of the four Vedas, and one of the scriptures of Hinduism. The exact century of Yajurveda's composition is unknown, and estimated by Witzel to be between 1200 and 800 BCE, contemporaneous with Samaveda and Atharvaveda.