佛祖統紀 34.77

34.77

四年。佛滅後五百年。天竺國無著出世闡教。其弟天親初造小乘論五百部。後因無著開悟。復造大乘論五百部。世稱千部論師。

In the fourth year, five hundred years after the Buddha's parinirvāṇa, Asaṅga appeared in India to propagate the teaching. His younger brother Vasubandhu initially composed five hundred treatises of the Hīnayāna; later, through Asaṅga's awakening of him, he additionally composed five hundred treatises of the Mahāyāna. The world called him the 'Master of a Thousand Treatises'.