《资治通鉴·唐纪·唐纪二十四》
郭元振连脚都没移动，但乌质勒年高体弱，耐不住严寒，在这次会面之后就死去了。
久之，雪深，元振不移足；乌质勒老，不胜寒，会罢而卒。
Guo Yuanzhen didn't even move his feet, but Wu Zhishille was old and weak and couldn't endure the severe cold. He died after this meeting.