《资治通鉴·汉纪·汉纪二十四》
刘兴不能回答。命他背诵《尚书》，又背不下去。成帝赐饮食与他共餐，成帝已用完餐，他还在吃，吃饱才罢休。吃完起身下去，袜带松开了，他还不知道。
不能对；令诵《尚书》，又废；及赐食于前，后饱；起下，袜系解。
Liu Xing could not answer. Emperor Cheng ordered him to recite the “Book of history”, but he could not repeat it either. Emperor Cheng asked to share food with him, which he already finished while Liu was still eating and did not stop until he was full, and left with his socks hanging down without notice.