Medicine Master Sutra ［薬師経］ ( Bhaishajyaguru-vaidūryaprabharāja-sūtra; Chin Yao-shih-ching;  Yakushi-kyō): A sutra that explains the blessings of the Buddha Medicine Master. The Medicine Master Sutra refers to any of four extant Chinese translations, though usually to the translation produced in 650 by Hsüan-tsang. In this work, Shakyamuni Buddha explains to Bodhisattva Manjushrī the virtues of the Buddha Medicine Master. First, the sutra recounts a previous life of the Buddha Medicine Master in which, as a bodhisattva, he made twelve vows to benefit the people. The great benefit of invoking his name is then described. The sutra also describes seven disasters that making offerings to the Buddha Medicine Master can avert, and how by doing so one can restore peace to the land. The Sanskrit text and a Tibetan translation are extant.