《资治通鉴·周纪·周纪一》
智宣子置之不理。智果便向太史请求脱离智族姓氏，另立为辅氏。
弗听，智果别族于太史为辅氏。
Zhi Xuanzi ignored him. Zhi Guo then requested from the Grand Historian to dissociate from the Zhi clan surname and establish a separate clan named Fu.