《论衡·卷七·道虚篇》
太子磕头竭力恳请说： 如果治好了父王的病，我跟我母亲将以死向父王力争。父王一定会答应我跟我母亲的请求。
太子顿首强请曰： 苟已王之疾，臣与臣之母以死争之於王，必幸臣之母。
The crown prince kowtowed and earnestly implored: “If you cure my father’s illness, my mother and I will plead to my father with our lives. He will certainly agree to our request. 