The Aitareya Upanishad is one of the older, "primary" Upanishads commented upon by Shankara. It is a Mukhya Upanishad, associated with the Rigveda. It figures as number 8 in the Muktika canon of 108 Upanishads. The Upanishads (; Devanagari ) are part of the Hindu Shruti scriptures which primarily discuss meditation and philosophy and are seen as religious instructions by most schools of Hinduism. ... Shankara can refer to: Shiva, the Hindu god Adi Shankara, Hindu philosopher of around the year 800 This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... The Rigveda (Sanskrit: , a tatpurusha compound of praise, verse and knowledge) is a collection of hymns (, plural ) counted among the four Hindu religious texts known as the s, and contains the oldest texts preserved in any Indo-Iranian language. ... The Muktikā (deliverance) Upanishad is the final Upanishad of the Advaita canon of 108 texts, and it is itself the source of this canon. ...