Is “In Cao Cao's camp, he never spoke a word” true?

novel invention

The Records of the Three Kingdoms, Book of Wei, Biography of Wen Hui and others record that Xu Shu rose to the positions of Right General of the Household and Censor-in-Chief in Wei. The saying 'in Cao Cao's camp, he never spoke a word' is a legend.

Xu Shu

A famous Wei and Shu scholar-official who, in official history, was chivalrous and fond of martial arts before turning to study, and who recommended Zhuge Liang to Liu Bei.

Other claims about Xu Shu