C18 Solemn Use of Life
Hsu Shen said slowly, "When Wu Zi was training, he used to eat and sleep with the soldiers in order to keep the soldiers alive."
"One day, Wu Zi toured the military camp and saw a pustule on his head. Wu Zi personally sucked it with his mouth, so all the soldiers returned to their own hearts and gave up their lives. Wherever Wu Zibing went, there was nothing he could not do