Note f94 — HISTORY OF ZEN BUDDHISM FROM BODHI-DHARMA TO HUI-NENG (YENO) (520 A.D.–713 A.D.)
Reading edition
According to this, there must have been a special volume of sermons and letters by Hui-k‘ê, which were compiled evidently by his disciples and admirers before they were put down in writing and thoroughly revised by the author himself. In the case of Bodhi-Dharma too, according to Tao-hsüan, his sayings were apparently in circulation in the day of Tao-hsüan, that is, early in the T‘ang dynasty.