phyi rgyud gsum

Three outer tantras. Kriya, Upa, and Yoga. The Kriya Tantras emphasize purification of body and speech through ritual and cleansing activities, establishing a relationship between the deity and the practitioner similar to the relationship of master and servant. Realization can be gained within sixteen human lifetimes [RY]

three outer tantras [kriy tantra, ubhaya or cary tantra, and yogatantra - kri ya 2) u pa 3) yo ga, = dka' thub rigs byed kyi theg pa rnying ma'i gzhung lugs la kri ya ste bya ba dang, au bha ya ste gnyis ka zhes spyod pa dang, yo ga ste rnal 'byor bcas phyi rgyud sde gsum ni khrus dang gtsang sbra la sogs pa'i dka' thub bram ze'i rig byed rnams dang tsul mthun par spyod pas dka' thub rig byed kyi theg pa zhes bya'o [IW]

Three Outer Tantras [RY]