SACRED TEXT of Buddhism. Hayagriva is the easiest to identify of all the Dharmapalas, by the horse's head in his hair. He originated from Hinduism where he was one of the manifestations of Vishnu. In Buddhism he is sometimes viewed as an incarnation of the Dhyani Buddhas Amithaba or Aksobhya. Hayagriva is the guardian of the sacred texts who scares his enemies away with his whinnying.