《明史·志·卷五十》
二十四年，清理佛、道二教，限令僧人每三年给予一次度牒。
二十四年，清理释、道二教，限僧三年一度给牒。
All temples and Taoist monasteries in every prefecture, state, and county were reduced to just one large one, and the monks and priests were consolidated into that one.