《旧唐书·本纪·卷六》
看那武氏称帝的年代，众多英才，无不由于牝鸡司晨而痛心，由于朝廷的危亡而愤怒。终竟不能报答先帝的恩情，保卫君王之子。
观夫武氏称制之年，英才接轸，靡不痛心于家索，扼腕于朝危，竟不能报先帝之恩，卫吾君之子。
Look at the era when Wu Zetian proclaimed herself emperor, and many talented people were heartbroken by the fact that the hen was in charge of the morning, and they were angry at the crisis of the imperial court. In the end, they could not repay the kindness of the late emperor and protect the emperor's son.