《汉书·传·外戚传上》
地节三年，宣帝找到了外祖母王媪，王媪的儿子王无故，无故的弟弟王武都跟随使者赶赴皇宫。
地节三年，求得外祖母王媪，媪男无故，无故弟武皆随使者诣阙。
In the third year of Dijie, Emperor Xuan found his maternal grandmother Wang Ao, and Wang Ao's son Wang Wu Gu, and Wu Gu's younger brother Wang Wu, who all followed the messenger to the palace.