Guru Padmasambhava ("Born from a Lotus") also known as Guru Rinpoche (Precious Guru) was a tantric Buddhist vajra master from India who taught Vajrayana in Tibet (circa 8th – 9th centuries). According to some early Tibetan sources like the Testament of Ba, he came to Tibet in the 8th century and helped construct Samye Monastery, the first Buddhist monastery in Tibet.
Because of his role in the founding of Samye monastery, the first monastery in Tibet, Padmasambhava is regarded as the founder of the Nyingma school of Tibetan Buddhism. Padmasambhava's activities in the Tibet include the practice of tantric rituals to increase the life of the king as well as initiating king Trisong Detsen into tantric rites.
The Vajra Guru mantra is:
Om ah hum vajra guru padma siddhi hum
Like most Sanskrit mantras in Tibet, the Tibetan pronunciation demonstrates dialectic variation and is generally