《新唐书·列传·卷二十一》
敦煌公封为秦王后，随即授玄龄职为王府记室，封为临淄侯。
公为秦王，即授府记室，封临淄侯。
After the Duke of Dunhuang was granted the title of King of Qin, Xuanling was immediately appointed a secretary in the Palace and granted the title of Marquis of Linzi.