In the Gongye Chang book of the Analects, Confucius calls Zai Yu, who slept in the daytime, 'rotten wood that cannot be carved'.
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history
Confucius said that although Gongye Chang had been in prison, it was through no fault of his, and gave him his daughter in marriage. A later legend says he understood the language of birds, and was jailed because he knew where a body lay that the birds had told him about.
usage
Book 5 opens 子谓公冶长 'The Master said of Gongye Chang', hence its name. 公冶 is a compound surname.