《资治通鉴·唐纪·唐纪一》
当初，炀帝料到有遇难的一天，经常用罂装毒酒带在身边，对宠幸的各位美女说： 如果贼人到了，你们要先喝，然后我喝。 
初，帝自知必及于难，常以罂贮毒药自随，谓所幸诸姬曰： 若贼至，汝曹当先饮之，然后我饮。 
In the beginning, Emperor Yang had predicted that he might encounter such a disaster someday. He often carried around wine laced with poison in a jar, and he would tell his favorite concubines: If the rebels come, you must drink this first, and then I will drink it.