《汉书·传·赵尹韩张两王传》
京兆尹管理京师治安，长安中人多，三辅尤其多。
京兆典京师，长安中浩穰，于三辅尤为剧。
The Magistrate of the Capital guarded the security of the capital – there were many people in Chang'an and even more in the three adjuncts (Sanfu).