The Bo tree, also called Bodhi tree, according to Buddhist tradition, is the pipal (Ficus religiosa) under which the Buddha sat when he attained Enlightenment (Bodhi) at Bodh Gaya (near Gaya, west-central Bihar state, India). A living pipal at Anuradhapura, Ceylon (now Sri Lanka), is said to have grown from a cutting from the Bo tree sent to that city by King Ashoka in the 3rd century BCE.
According to Tibetan tradition when Buddha went to the holy Lake Manasorovar along with 500 monks, he took with him the energy of Prayaga Raj. Upon his arrival, he installed the energy of Prayaga Raj near Lake Manasorovar, at a place now known as Prayang. Then he planted the seed of this eternal banyan tree next to Mt. Kailash on a mountain known as the "Palace of Medicine Buddha".