佛祖統紀 40.36

40.36

二十七年。勅天下僧道。遇國忌就龍興寺行道散齋。千秋節祝壽就開元寺。

In the twenty-seventh year, an edict ordered that monks and Daoist priests throughout the empire, on state memorial days, proceed to Longxing Monastery to practice the ritual path and conclude the fast; and on the Qianqiu Festival to pray for imperial longevity, proceed to Kaiyuan Monastery.