《汉书·传·王莽传上》
臣没有兼任数职的才能，现在朝廷既然失误地任用了臣，臣请求御史刻宰衡的印章叫作 宰衡太傅大司马印，刻好后，授给臣，臣就上交太傅和大司马的印信。 
臣莽无兼官之材，今圣朝既过误而用之，臣请御史刻宰衡印章曰 宰衡太傅大司马印 ，成，授臣莽，上太傅与大司马之印。 
I do not have the talent to hold multiple positions concurrently, now that the court has made a mistake by appointing me, I request that the imperial censor carve a seal for the Zaixiang with the name "Seal of Zaixiang Grand Tutor Grand Marshal." Once it is done, please have it given to me, and I will hand over the seals of Grand Tutor and Grand Marshal.