《论衡·卷八·儒增篇》
书上称赞：齐国的孟尝君，魏国的信陵君，赵国的平原君，楚国的春申君，能谦恭地款待下面的门客，于是招引会聚了四面八方来的士，各得三千人。
书称： 齐之孟尝，魏之信陵，赵之平原，楚之春申君，待士下客，招会四方，各三千人。 
The book praises Lord Mengchang of Qi, Lord Xinling of Wei, Lord Pingyuan of Zhao and Lord Chunshen of Chu for being humble and courteous in their treatment of those who served them, and so they attracted gentlemen from far and wide, each gaining three thousand. 