《汉书·传·卫青霍去病传》
当初，卫青显贵以后，平阳侯曹寿患恶疾回到封国，长公主问： 列侯当中谁最贤能？ 
初，青既尊贵，而平阳侯曹寿有恶疾就国，长公主问： 列侯谁贤者？ 
In the past, after Wei Qing had risen to prominence, Pingyang Hou Cao Shou returned to his fiefdom suffering from an illness. The princess asked (曹壽), "Who is the most virtuous among the marquises?"