The Religion of the Samurai: A Study of Zen Philosophy and Discipline in China and Japan by Kaiten Nukariya: “King Teh Chwen Tang Luh (Kei-toku-den-to-roku), published by Tao Yuen (Do-gen) A.D. 1004, gives a detailed narrative concerning this incident as stated here, but earlier historians tell us a different story about the mutilation of Shang Kwang's arm.”