Macbeth's fears of Banquo begin to grow as he realizes that the witches prophesied that his lineage would be the future kings. He hires two murders and convinces them that Banquo is their enemy and he must die.
Thou canst not say I did it. Never shake thy gory locks at me.
Macbeth expresses his feelings of how he is afraid of Banquo to Lady Macbeth. He tells her that the job isn't done and there are still major threats to the throne. He also tells her to be kind to Banquo now to give him a false sense of good from the king and queen.
Why, how now, Hecate! You look angerly.
The murderers go out into a wooded area where they find Banquo and Fleance. While they do kill Banquo, Fleance gets away and is told by his father to seek revenge for what has happened.
His message ere he come, that a swift blessing May soon return to this our suffering country Under a hand accursed!
I'll send my prayers with him.
At the beginning of a feast, Macbeth is told that Banquo is dead, but Fleance got away. Macbeth is startled by the news. When he goes to his chair, he sees Banquo's ghost in his seat. He begins to speak to it, while no one else is able to see it. Lady Macbeth tells their guests to just ignore Macbeth because he just needs sleep.
Gentlemen, rise. His highness is not well.
The three witches meet with their master, Hecate. Hecate is mad that the witches have intervened with Macbeth without her consent. She says the next day they will confuse him, and again mislead him with their prophecies.
Have I not reason, beldams as you are?
Lennox and a lord talk to each other about how they both dislike Macbeth and how the murder of Banquo was falsely blamed on Fleance. They also talk of how Macduff is teaming up with Malcolm to fight Macbeth and reclaim the throne.