《旧唐书·列传·卷三》
周文王姬昌囚禁在里时，吉祥的神鸟正好飞来；汉高祖刘邦潜藏在砀山时，吉祥的红云自己出现。
文王厄于羑里，赤雀方来；高祖隐于砀山，彤云自起。
When King Wen of Zhou, Ji Chang, was imprisoned in Li, a lucky bird happened to fly in; when Emperor Gaozu of Han, Liu Bang, was hiding in Dangshan, a lucky red cloud appeared by itself.