Mencius - Book 5, Part 1, Chapter 4D

'Of all which a filial son can attain to, there is nothing greater than his honoring his parents. And of what can be attained to in the honoring one's parents, there is nothing greater than the nourishing them with the whole kingdom. Kû-sâu was the father of the sovereign; this was the height of honor. Shun nourished him with the whole kingdom; this was the height of nourishing. In this was verified the sentiment in the Book of Poetry,

"Ever cherishing filial thoughts,
Those filial thoughts became an example to after ages."

'It is said in the Book of History, "Reverently performing his duties, he waited on Kû-sâu, and was full of veneration and awe. Kû-sâu also believed him and conformed to virtue." This is the true case of the scholar of complete virtue not being treated as a son by his father.'
~ James Legge translation via nothingistic.org ~

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