《旧唐书·列传·卷一》
窦氏擅长写文章来作为天下女子的规范，行文素雅得体。又擅长书法，临幕的字与高祖的字放在一起，别人分辨不出来。
善书学，类高祖之书，人不能辨。
Dou was good at writing articles as a model for women in the world. Her writing style was elegant and decent. She was also good at calligraphy. When her writing was placed next to Gao Zu's, others could not tell the difference.