yi ge med pa'i rgyud
letterless tantra. [JV]
Letterless Tantra. [RY]
The Tantra of No Letters. This tantra describes the actual means of practice, how to abandon activities and live in places free from defects, the four ways of 'freely resting,' sustaining naturalness as well as the undefiled method of the main part of practice. [RY]
Note: The names, numbers and the tantras themselves in these lists may vary from teacher-to-teacher, tradition-to-tradition. Some call for 17, some call for 18, and some add still an additional tantra making the total 19. See also Seventeen Tantras of the Great Perfection and Eighteen Dzogchen Tantras for further reference.