《旧唐书·本纪·卷二十》
何况天象和符瑞显示得又多又明白，正如虞舜、夏禹时代的昌盛显示在图篆上一样。
况天文符瑞，杂沓宣明，虞夏昌期，显于图箓。
Moreover, the celestial phenomena and auspicious signs have shown themselves to be both many and clear, just as the prosperity of the ages of Yu Shun and Xia Yu were shown in their pictorial symbols.