《汉书·传·薛宣朱博传》
现在中二千石的官员没有经历御史大夫而任丞相，权力很轻，不是尊重国家政治的方法。
今中二千石未更御史大夫而为丞相，权轻，非所以重国政也。
Now among the Zhong Er Qian Shi officials, no one has served as an Yushi Daifu before becoming a prime minister, their power is very light, and it is not the way to respect state politics.