《资治通鉴·宋纪·宋纪二》
拓跋焘的母亲杜贵嫔死时，拓跋焘年纪尚幼。明元帝拓跋嗣因为窦氏心地善良，品德好，所以让她哺育拓跋焘。
密后之殂也，世祖尚幼，太宗以窦氏慈良，有操行，使保养之。
When Emperor Taiwu's mother, Imperial Consort Dugui, died, Emperor Taiwu was still young. Emperor Mingyuan Tuoba Si felt that Dou was kind-hearted and virtuous, so he let her nurse Emperor Taiwu.