eye of newt and toe of frog

The phrase "eye of newt and toe of frog" comes from William Shakespeare's play Macbeth. It is a part of the witches' spell, specifically in Act 4, Scene 1. In the play, the three witches gather ingredients for their grotesque concoction, which includes seemingly odd and supernatural elements such as "eye of newt" and "toe of frog." These ingredients are symbolic and represent the mystical and magical nature of the witches and their spells. It's important to note that "eye of newt and toe of frog" does not refer to actual body parts but rather acts as a metaphor for unseen and mystic qualities.