《新唐书·列传·卷四十六》
人民思念李家王朝，所以殿下要取回天下是十分容易的。现在天下已安定了，然而太平公主专想建立功业，天子左右的大臣大多数都听她指挥，天子因她是自己的妹妹，所以一直容忍她。若长此以往，臣私下为殿下的将来担心。 
太子遽召见，琚曰： 韦氏躬行弑逆，天下动摇，人思李氏，故殿下取之易也。今天下已定，太平专思立功，左右大臣多为其用，天子以元妹，能忍其过，臣窃为殿下寒心。 
"The people yearn for the Li family dynasty, so it would be very easy for Your Imperial Highness to take back the country. Now the nation is already stable, but Princess Taiping is solely focused on establishing merit and achievements, and most of the ministers around the Son of Heaven listen to her orders, while the Son of Heaven一直 tolerates her because she is his own younger sister. If things carry on like this, this subject is secretly apprehensive about Your Imperial Highness's future."