Approach and Accomplishment of the Three Vajras
Approach and Accomplishment of the Three Vajras (Tib. རྡོ་རྗེ་གསུམ་གྱི་བསྙེན་སྒྲུབ་, dorje sum gyi nyendrub, Wyl. rdo rje gsum gyi bsnyen sgrub) aka Orgyen Nyengyü (Tib. ཨོ་རྒྱན་བསྙེན་བརྒྱུད་, orgyen nyen gyü, Wyl. o rgyan bsnyen brgyud) — one of the eight practice lineages which was brought to Tibet by Orgyenpa Rinchen Pal. These teachings were given to him directly by Vajrayogini, when he travelled to Oddiyana.
- Ringu Tulku, The Ri-me Philosophy of Jamgön Kongtrul the Great (Boston & London: Shambhala Publications, 2007), pages 153-154 & 189-191.