《资治通鉴·晋纪·晋纪十五》
阮孚对他说： 您常常没有闲暇舒泰的时候，好像嘴含瓦石，不是也很劳累吗？ 
阮孚谓之曰： 卿常无闲泰，如含瓦石，不亦劳乎！ 
Ruan Fu said to him: You are often so busy, as if you have something like a roof tile or a stone under your mouth, aren't you tired? 