《旧唐书·列传·卷六十八》
代宗七月在内道场望日修造盂兰盆，以金翠装饰，所需费用达百万。
代宗七月望日于内道场造盂兰盆，饰以金翠，所费百万。
In July of the Daizong era, on the Observance of Ullambana Day, Buddhist masses were held at the Inner Monastery. Decorated in gold and jade, the masses cost millions.