《战国策·燕三·燕太子丹质于秦亡归》
樊于期袒露出一条臂膀，握住手腕，走近一步说： 这是我日夜咬牙切齿、痛彻心胸的事情，居然在今天能听到您的指引。 
樊於期偏袒扼腕而进曰： 此臣日夜切齿拊心也，乃今得闻教。 
Fan Yuqi bared an arm, held his wrist, and walked closer to say: This is something that I have gritted my teeth and bitterly thought about day and night, but I actually heard your guidance today.