The Bṛhadāraṇyaka Upanishad (Sanskrit: बृहदारण्यक उपनिषद्) is one of the older, "primary" (mukhya) Upanishads. It is contained within the Shatapatha Brahmana, and its status as an independent Upanishad may be considered a secondary extraction of a portion of the Brahmana text. This makes it one of the old texts of the Upanishad corpus, dating to roughly the 8th to 5th centuries BCE. It is largely the oldest Upanishad, excluding some parts which were composed after the Chandogya. It is associated with the Shukla Yajurveda. It figures as number 10 in the Muktika canon of 108 Upanishads and was notably commented upon by Adi Shankara.