The Dattatreya Upanishad (Sanskrit: दत्तात्रेय उपनिषत्), also called the Dattatreyopanishad, is a Sanskrit text and one of the minor Upanishads of Hinduism. It is attached to the Atharvaveda, and classified as a text of the Vaishnava sect, which worships the god Vishnu. The Dattatreya Upanishad appears in the Telugu language anthology of 108 Upanishads called the Muktika canon, narrated by Rama to Hanuman, where it is listed at number 101. However, the Upanishad is neither part of the anthology of 52 popular Upanishads in north India by Colebrooke, nor is it found in the Bibliotheca Indica anthology of popular Upanishads in south India by Narayana. The text is a Tantra and Vaishnava work, likely one of the relatively recent, 14th- or 15th-century CE era composition compared to other Upanishads. The text presents a Vaishnava mantra that is the most popular mantra in Dattatreya tradition, as well as a series of tantric mantras for the worship of sage Dattatreya, a form of Vishnu. The text asserts that the worship of Vishnu, Narayana and Dattatreya leads one to the nature of Truth-Bliss-Knowledge. (en)
The Dattatreya Upanishad (Sanskrit: दत्तात्रेय उपनिषत्), also called the Dattatreyopanishad, is a Sanskrit text and one of the minor Upanishads of Hinduism. It is attached to the Atharvaveda, and classified as a text of the Vaishnava sect, which worships the god Vishnu. (en)