bya rgyud

བྱ་རྒྱུད།
Kriyatantra; activity tantra, tantra as activity; Action Tantra; Abbr. of bya ba'i rgyud. Lowest of the four levels of Tantra. (RY)

action tantra, mystic ritual, Kriyatantra, tantras concerned with ritual, kriyayoga, 1 of phyi rgyud sde gsum. (JV)

kriya tantra, action tantra. (IW)

In the Kagyu tradition, this is described as the class of tantras which is primarily concerned with external actions such as keeping clean; giving up eating meat, garlic, and onions; and so forth. DKC