《晋书·帝纪·第十章》
不久有人说： 马是国姓，却自己去杀马，太不吉利了。 恭帝也醒悟，非常悔恨做了遣件事。
既而有人云 马者国姓，而自杀之，不祥之甚 帝亦悟，甚悔之。
It was not long before someone pointed out that 'Horse' was the imperial surname, and to kill a horse was inauspicious. The Retired Emperor realised this and deeply regretted what he had done.