《魏书·列传·卷九》
高祖告诫五壅说： 扭业是旧时都城，除非朝廷贤士有德行名望的人不能在这里任职，所以派你做州牧。
高祖诫雍曰： 相州乃是旧都，自非朝贤德望无由居此，是以使汝作牧。
Gao Zu told Wu Yong: "Niu Ye is the former capital city. No one but贤士 with virtue and reputation in the court can serve here, which is why you are being sent to serve as the governor."