Om mani padme hum is probably the most famous mantra of Buddhism, the mantra of six syllables of the Bodhisattva of compassion Avalokiteshvara he is known as Chenrezig in Tibetan. The mantra “Om mani padme hum” is associated particularly with the representation of four arms Shadakshari of Avalokiteshvara. It is said that the Dalai Lama is a reincarnation of Avalokiteshvara, which is why the mantra is especially revered by his followers. Its recitation expresses the desire for liberation of all living creatures and from the cycle of rebirth.
Om mani padme hum Mantra is always called mani wheels in Tibet.