Chapter 19, Part 11 - Chuang Tzu

Tung-yeh Chi was displaying his carriage driving before Duke Chuang. He drove back and forth as straight as a measuring line and wheeled to left and right as neat as a compass-drawn curve. Duke Chuang concluded that even Tsao Fu could do no better, and ordered him to make a hundred circuits and then return to the palace.

Yen Ho happened along at the moment and went in to see the duke. "Tung-yeh Chi's horses are going to break down," he said. The duke was silent and gave no answer.

In a little while Tung-yeh Chi returned, his horses having in fact broken down. The duke asked Yen Ho, "How did you know that was going to happen?" Yen Ho said, "The strength of the horses was all gone and still he was asking them to go on - that's why I said they would break down."
~ Burton Watson translation via Terebess Asia Online ~

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