《后汉书·列传·郑孔荀列传》
以前揭露袁术的罪过，现在又把刘表的事宣扬开来，这是使瘸腿的母羊窥视高岸，认为天险也可上啊！
前以露袁术之罪，今复下刘表之事，是使跛牂欲窥高岸，天险可得而登也。
In the past, Yuan Shu's crimes were revealed, and now Liu Biao's crimes are being publicized. This is to make the lame ewe look at the Gao'an and think that the natural danger can also be ascended!