From wikipedia:

The Laṅkāvatāra Sūtra recounts a teaching primarily between the Buddha and a bodhisattva named Mahāmati ("Great Wisdom"). The sūtra is set in Laṅkā, the island fortress capital of Rāvaṇa, the king of rākṣasas. The Laṅkāvatāra Sūtra figured prominently in the development of Chinese, Tibetan and Japanese Buddhism. It is notably an ( Read more... )