《汉书·董贤传》:“常与上卧起。尝昼寝，偏藉上袖，上欲起，贤未觉，不欲动贤，乃断袖而起。”

哀帝对董贤的爱之深，可用一个例子来说：据说，一天哀帝早晨醒来，见董贤还睡着，哀帝欲将衣袖掣回，却又不忍惊动董贤。可是衣袖被董贤的身体压住，不能取出。但要仍然睡下，自己又有事，不能待他醒来，情急之下，哀帝竟从床头拔出佩刀，将衣袖割断，然后悄悄出去。所以后人把宠爱男色，称作“断袖癖”。当时宫女都加以效仿而割断一只衣袖。待董贤醒来，见身下压着哀帝的断袖，也感到哀帝的深情，从此越发柔媚，须臾不离帝侧。后人将同性恋雅称为“断袖之癖”，便是源出于此。

lit. cut sleeve (idiom); fig. euphemism for homosexuality, originating from History of Western Han 汉书:emperor Han Aidi (real name Liu Xin) was in bed with his lover Dong Xian, and had to attend a court audience that morning. Not wishing to awaken Dong Xian, who was sleeping with his head resting on the emperor's long robe sleeve, Aidi used a knife to cut off the lower half of his sleeve.