《资治通鉴·唐纪·唐纪十二》
古人安葬均在京城的北面，墓地有固定的地方，这便是不另外选择墓地。
古之葬者皆于国都之北，兆域有常处，是不择地也。
The former people were all buried in the north of the capital, and the cemetery had a fixed place, so there was no other choice of cemetery.