《史记·三十世家·吴太伯世家》
季子说： 不对，当初我内心已答应了他，怎能因为徐君之死我就违背我自己的心愿呢！ 
季子曰： 不然。始吾心已许之，岂以死倍吾心哉！ 
Ji Zi said, "No, I have agreed to give it to him in my heart. How can I go against my will just because Xu Jun has passed away?"