《搜神记·卷十一》
曾参跟随孔子出游，在楚国时感到心跳，就辞别了孔子回家询问母亲。母亲说： 我思念你，所以咬了自己的手指。 
曾子从仲尼在楚，而心动，辞归，问母，母曰： 思尔，啮指。 
Zeng Can followed Confucius and traveled with him. When they were in the State of Chu, Zeng Can felt his heart pounding, so he bid farewell to Confucius and went home to ask his mother. His mother said: I was thinking of you, so I bit my finger.