《韩非子·外储说左上》
叔向在晋平公处陪坐，平公和他商量事情，平公腿痛脚麻以至抽筋，还是不敢坐得不端正。
叔向御坐平公请事，公腓痛足痹转筋而不敢坏坐。
Shu Xiang was sitting next to Duke Ping of Jin, who discussed some matters with him. Duke Ping's legs ached and went numb, even had muscle spasms, but he dared not sit unright.