Three Witches

The Three Witches represent evil, darkness, chaos, and

conflict, while their role is as agents and witnesses.

Their presence communicates treason and impending doom.

During Shakespeare's day, witches were seen as worse

than rebels, "the most notorious traitor and rebel that

can be". They were not only political traitors, but

spiritual traitors as well.

Much of the confusion that springs from them comes from

their ability to straddle the play's borders between

reality and the supernatural. They are so deeply

entrenched in both worlds that it is unclear whether

they control fate, or whether they are merely its agents.

They defy logic, not being subject to the rules of

the real world.

https://en.wikipedia.org/wiki/Three_Witches

https://authorzilla.com/wxryl/unreal-mockery-unreason-and-the-problem-of-spectacle-in-macbeth.html

–

First Witch

I come, Graymalkin!

Second Witch

Paddock calls.

Third Witch

Anon.

…

Messenger

As I did stand my watch upon the hill,

I look'd toward Birnam, and anon, methought,

The wood began to move.

http://shakespeare.mit.edu/macbeth/full.html