《孟子·梁惠王章句下·第十六节》
后来乐正子见到孟子时说： 我告诉了君王，君王本来要来见你的，但有一个他宠爱的近臣臧仓阻止了他，鲁君因此没有来。 
乐正子见孟子，曰： 克告于君，君为来见也。嬖人有臧仓者沮君，君是以不果来也。 
Later, when Yue Zhengzi met Mengzi, he said: I told the King everything. The King would have come to see you, but his favored retainer Zang Cang stopped him, so that’s why the King didn’t come.