《论衡·卷十三·效力篇》
勉强做超过自己十倍、百倍能力的事情，会胸中吐血，神魂颠倒，直至气绝。
勉自什伯，鬲中呕血，失魂狂乱，遂至气绝。
Forcibly doing things that exceed one's own ability tenfold or a hundredfold will cause blood to vomit from the chest, loss of consciousness, and eventually death.