Mencius - Book 2, Part 2, Chapter 12A

When Mencius had left Ch'î, Yin Shih spoke about him to others, saying, 'If he did not know that the king could not be made a T'ang or a Wû, that showed his want of intelligence. If he knew that he could not be made such, and came notwithstanding, that shows he was seeking his own benefit. He came a thousand lî to wait on the king; because he did not find in him a ruler to suit him, he took his leave, but how dilatory and lingering was his departure, stopping three nights before he quitted Châu! I am dissatisfied on account of this.'

The disciple Kâo informed Mencius of these remarks.

Mencius said, 'How should Yin Shih know me! When I came a thousand lî to wait on the king, it was what I desired to do. When I went away because I did not find in him a ruler to suit me, was that what I desired to do? I felt myself constrained to do it.

'When I stopped three nights before I quitted Châu, in my own mind I still considered my departure speedy. I was hoping that the king might change. If the king had changed, he would certainly have recalled me.
~ James Legge translation via nothingistic.org ~

Go here to read the introductory post to this serialized version of the Works of Mencius.