《管子·轻重丁》
管仲说： 今天我路过市区，看到有两家新建了粮仓，请君上分别送上玉壁礼问之。 桓公说： 可以。 
管子曰： 今者夷吾过市，有新成囷京者二家，君请式璧而聘之。 恒公曰： 诺。 
Guan Zhong said: Today I passed by the downtown area and saw that two families have newly built granaries. Please let the emperor give them jade gifts and ask them about it. Duke Huan said: "Yes."