《资治通鉴·汉纪·汉纪四十六》
单超等人对桓帝说： 陛下如今既然已下定决心，千万不要再提这件事，怕会引起猜疑。 
超等曰： 陛下今计已决，勿复更言，恐为人所疑。 
Shan Chaao and others said to Emperor Huan: Your Majesty has now made up his mind, we must never mention this again as this will arouse suspicion.