《资治通鉴·梁纪·梁纪三》
元怿向北魏宣武帝进言： 过去季氏超越名分在泰山祭祀，孔子对此非常愤慨。
怿言于魏主曰： 昔季氏旅于泰山，孔子疾之。
Yuan Yi reported to Emperor Xuanwu of Northern Wei: in the past, the Jishi clan of Lu overstepped their bounds by offering sacrifices at Mount Tai, which left Confucius very indignant.