Dattatreya (Sanskrit: दत्तात्रेय, IAST: Dattātreya), Dattā or Dattaguru, is a paradigmatic Sannyasi (monk) and one of the lords of Yoga, venerated as a Sanatan/Hindu god

In Maharashtra, Goa, Andhra Pradesh, Telangana, Karnataka, Gujarat, and Madhya Pradesh he is a syncretic deity, considered to be an avatar of the three Hindu/sanatan gods Brahma, Vishnu and Shiva, collectively known as the Trimurti

In other regions, and some versions of texts such as Garuda Purana, Brahma Purana and Sattvata Samhita, he is an avatar of Lord Vishnu only

Several Upanishads are dedicated to him, as are texts of the Vedanta-Yoga tradition in Sanatani/Hinduism

One of the most important texts of Hinduism, namely Avadhuta Gita (literally, “song of the free soul”) is attributed to Dattatreya

Over time, Dattatreya has inspired many monastic movements in Shaivism, Vaishnavism and Shaktism, particularly in the Deccan region of India, south India, Gujarat, Madhya Pradesh, Rajasthan and Himalayan regions where Shiva tradition has been strong

His pursuit of simple life, kindness to all, sharing of his knowledge and the meaning of life during his travels is reverentially mentioned in the poems by Tukaram, a saint-poet of the Bhakti movement

According to Rigopoulos, in the Nath tradition of Shaivism, Dattatreya is revered as the Adi-Guru (First Teacher) of the Adinath Sampradaya of the Nathas, the first “Lord of Yoga” with mastery of Tantra (techniques), although most traditions and scholars consider Adi Nath to be an epithet of Lord Shiva

According to Mallinson, Dattatreya is not the traditional guru of the Nath Sampradaya but instead was co-opted by the Nath tradition in about the 18th century as a guru, as a part of Vishnu-Shiva syncretism

This is evidenced by the Marathi text Navanathabhaktisara, states Mallinson, wherein there is syncretic fusion of the Nath Sampradaya with the Mahanubhava sect by identifying nine Naths with nine Narayanas

Dattatreya iconography varies regionally

In Maharashtra, for example, he is typically shown with three heads and six hands, one head each for Brahma, Vishnu and Shiva who represent the Trimurti, the 3 main gods in Hinduism, and one pair of hands holding the symbolic items associated with each of these gods: japamala and water pot of Brahma, conch and discus of Vishnu, trident and drum of Shiva

He is typically dressed as a simple monk, situated in a forest or wilderness suggestive of his renunciation of worldly goods and pursuit of a meditative yogic lifestyle

In paintings and some large carvings, he is surrounded by four dogs and a cow, which symbolise the four Vedas and mother earth who nourishes all living beings

In the temples of southern Maharashtra, Varanasi, and in the Himalayas, he is shown with one head and two hands accompanied by four dogs and a cow

An annual festival in the Hindu calendar month of Mārgaśīrṣa (November/December) reveres Dattatreya and is known as Datta Jayanti