《史记·三十世家·三王世家》
四月丙申日，进奏未央宫： 太仆臣公孙贺代理御史大夫官职昌死进言：太常臣赵充说通过占卜得知四月二十八日乙时，可以立诸侯王。
四月丙申，奏未央宫。 太仆臣贺行御史大夫事昧死言：太常臣充言卜入四月二十八日乙巳，可立诸侯王。
On April day Bingshen, it was presented in the Weiyang Palace: The minister of the imperial stables and the acting minister of the imperial censorate official Gongsun 贺 delivered and reported: The minister of the imperial clan Zhao Chong said by divination that on the day of April twenty-eight at the hour of Yi, one can establish the feudal lords.