《论衡·卷八·儒增篇》
拿刀刃抹脖子，自杀，树起刀锋刺进胸膛，由于有锋刃的帮助，所以手完全能够形成这样的威力。
执刃刎颈，树锋刺胸，锋刃之助，故手足得成势也。
With a knife to the neck, one commits suicide; raising a bladed sword into the chest, due to the assistance of the blade’s sharpness, the hand is perfectly capable of performing such an act.