佛祖統紀 37.20

37.20

六年。勅光宅寺法雲為大僧正。官給吏力（僧正始於姚秦今加大字）。

In the sixth year, an imperial decree appointed Fayun of Guangzhai Monastery as Grand Rector of Monks (Da Sengzheng), with official clerical staff provided by the state. (The office of Rector of Monks began in the Yao Qin; now the word 'Grand' was added.)