《旧唐书·本纪·卷十》
江山险要阻绝，奏请大事，路途断绝，宗社国家，须要人主持。
江山阻险，奏请路绝，宗社神器，须有所归。
The landscape is dangerous and blocked, and the road is blocked when the great event is petitioned. Thezongshe country needs someone to preside over it.