AJAT SAGAR, by Surjan Das Ajat, is the religious book of the Ajatpanthi sect of the Udasis. Written in AD 1851, the only known manuscript of the work was available in the Sikh Reference Library, Amritsar, until it perished during the Blue Star action in the holy premises in 1984. The author Surjan Das (father: Bagh Singh, mother: Gulab Devi, a disciple of Sant Tahil Das who was in the Bhagat Bhagvanie sect of the Udasis, established his gaddi at Ajneval, in Gujrariwala district, now in Pakistan. Surjan Das preached the ideal of a casteless (a = without; Jat = caste) society and thus came to be called Ajat and his followers Ajatpanthi.
UDASI, an ascetical sect of the Sikhs founded by Sri Chand (1494-1629), the elder son of Guru Nanak. Udasi is derived from the Sanskrit word udasin, i.e. one who is indifferent to or disregardful of worldly attachments, a stoic, or a mendicant. In Sikh tradition, the term iidasi has also been used for each of the four preaching tours of Guru Nanak ; in this sense, udasi meant a prolonged absence from home. Some scholars, including many Udasis, trace the origin of the sect back to the Puranic age, but, historically speaking, Sri Chand was the founder.