Laṅkāvatāra Sūtra
In the 5th century, the Chán (Zen) teachings began in China, traditionally attributed to the Buddhist monk Bodhidharma, a legendary figure. The school heavily utilized the principles found in the "Laṅkāvatāra Sūtra", a sūtra utilizing the teachings of Yogācāra and those of Tathāgatagarbha, and which teaches the One Vehicle (Skt. Ekayāna) to buddhahood. In the early years, the teachings of Chán were therefore referred to as the "One Vehicle School." The earliest masters of the Chán school were called "Laṅkāvatāra Masters", for their mastery of practice according to the principles of the "Laṅkāvatāra Sūtra".