《旧唐书·列传·卷三十八》
中书令宗楚客对韦温说 ：现在必须请皇太后临朝，应当停止相王辅政，况且皇太后与相王是叔嫂关系不便通问，很难为礼节，按理这样是完全不行的。 
中书令宗楚客谓温曰： 今须请皇太后临朝，宜停相王辅政。且皇太后于相王居嫂叔不通问之地，甚难为仪注，理全不可。 
Zong Chuke, the minister of book order, said to Wei Wen: Now we must invite the empress dowager to preside over the imperial court, and Prince Xiang should stop assisting in political affairs. Moreover, the empress dowager and Prince Xiang are uncle and sister-in-law and it is inconvenient for them to communicate with each other, which makes it difficult to observe the etiquette—theoretically, this is absolutely not allowed.