Chapter 5, Part 6A - Lieh Tzu

Hei Luan of Wei had a secret grudge against Ch'iu Ping-chang, for which he slew him; and Lai Tan, the son of Ch'iu Ping-chang, plotted vengeance against his father's enemy. Lai Tan's spirit was very fierce, but his body was very slight. You could count the grains of rice that he ate, and he was at the mercy of every gust of wind. For all the anger in his heart, he was not strong enough to take his revenge in open fight, and he was ashamed to seek help from others. So he swore that, sword in hand, he would cut Hei Luan's throat unawares.

This Hei Luan was the most ferocious character of his day, and in brute strength he was a match for a hundred men. His bones and sinews, skin and flesh were cast in superhuman mold. He would stretch out his neck to the blade or bare his breast to the arrow, but the sharp steel would bend or break, and his body show no scar from the Impact. Trusting to his native strength, he looked disdainfully upon Lai Tan as a mere fledgling.
~ Lionel Giles translation via Terebess Asia Online ~

Go here to read the introductory post to the chapters of the Book of Lieh Tzu.