《周书·列传·卷二十二》
苏绰读完以后笑着说： 枳和橘尚且可以改变自己的特性，何况才子呢。 不久柳庆以本官都兵郎中的身份兼任雍州别驾。
绰读而笑曰： 枳橘犹自可移，况才子也。 寻以本官兼雍州别驾。
After finishing reading it, Su Zhuo said with a smile: Oranges and pomelos can even change their own characteristics, not to mention talents. Not long after, Liu Qing concurrently served as Yuzhou Bijia in the official position of Dubing Langzhong.