In William Shakespeare's play "Macbeth", the three witches are known to throw various ingredients into their cauldron to create their spell:
1. "Eye of newt" - a type of mustard seed
2. "Toe of frog" - actually the bulbous base of the stem of a buttercup plant
3. "Wool of bat" - the moss-like growth on certain trees, also known as "bat wool"
4. "Tongue of dog" - a species of wild plant called houndstongue
5. "Adder's fork" - a type of fern
6. "Blind-worm's sting" - the legless lizard or slow worm
7. "Lizard's leg" - a type of legume or pod-bearing plant
8. "Howlet's wing" - the wing of an owl
These ingredients are often referred to as the "witches' brew" or "witches' cauldron" and are used to create a potion with magical properties.