ost "Harry Potter and The Prizoner Of Azkaban"

In the cauldron boil and bake, 
Fillet of a fenny snake, 
Scale of dragon, tooth of wolf, 
Witches' mummy, maw and gulf.
Double, double, toil and trouble 
Fire burn and cauldron bubble 
Double, double, toil and trouble 
Fire burn and cauldron bubble 
Double, double, toil and trouble 
Fire burn and cauldron bubble
Something wicked this [bad word]