《新唐书·列传·卷一百二十九》
武后最小，保姆抱出来见天纲，骗说是男孩。天纲仔细打量后大惊： 龙瞳凤颈，是极贵之相。如果是女孩，当做天子。 
后最幼，姆抱以见，绐以男，天纲视其步与目，惊曰： 龙瞳凤颈，极贵验也；若为女，当作天子。 
Wu Zetian was the youngest. The nanny brought her out to see Tian Gang, claiming that she was a boy. Tian Gang looked at her carefully and was shocked, saying, "Dragon's eyes and a phoenix's neck, she is a very noble person. If she were a girl, she would become the emperor."