The witches foretold that Macbeth would be king and that Banquo’s line would eventually sit on the throne
Elsewhere in the castle, Lady Macbeth expresses despair and sends a servant to fetch her husband. Macbeth enters and tells his wife that he too is discontented, saying that his mind is “full of scorpions”
Go get him! His mind is full of scorpions!
Macbeth talks to the three murderers. He questions their manhood in order to make them angry, and their desire to murder Banquo and Fleance
Macbeth and Lady Macbeth enter as king and queen, followed by their court, whom they bid welcome.
Returning to his guests, Macbeth goes to sit at the head of the royal table but finds Banquo’s ghost sitting in his chair.
Blood will have blood
Macbeth mutters that “blood will have blood” and tells Lady Macbeth that he has heard from a servant-spy that Macduff intends to keep away from court, behavior that verges on treason