《元史·列传·卷四十三》
世祖说 ：士元健捷过人，昼战必能制敌，夜战而死，十分可惜。 
帝曰： 不花健捷过人，昼战必能制敌，夜战而死，甚可惜也。 
Shizu said: Shiyuan is agile and extraordinary. He can certainly defeat the enemy in daytime battles, but it is a pity that he died in night battles.