Dharmarakshita (Sumatran)
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Dharmarakshita (Tibetan: Serlingpa) was a renowned 10th century Sumatran Buddhist teacher who composed an important Mahayana text called the Wheel of Sharp Weapons (Tib. blo-sbyong mtshon-cha 'khor-lo). He was the teacher of Atisha, who was instrumental in establishing a second wave of Buddhism in Tibet.