|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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Witches' Mummy is a potion ingredient with an unknown effect. It could refer to a mummy belonging to a witch, a mummy created by a witch, or possibly a mummified witch. The phrase is featured in the song "Something Wicked This Way Comes."
- Harry Potter and the Prisoner of Azkaban (film) (Mentioned only)