Our fears in Banquo stick deep... My genius is rebuked, as it is said, Mark Antony's was by Caesar.
Act 3 Scene 2
We have scorched the snake, not killed it... O, full of scorpions is my mind, dear wife!
Act 3 Scene 3
Fly, good Fleance, fly, fly, fly!
There's but one down; the son is fled
Macbeth and Lady Macbeth invite Banquo to a feast, where Banquo tells him that he will be leaving with Fleance in the afternoon. When all leave, Macbeth then begins a soliloquy revealing his fears for Banquo and of how he will have sons who are kings, but he himself will not, and Banquo is now his enemy. A servant enters with two murderers and Macbeth attempts to convince them that Banquo has wronged them, and they should take their revenge, by killing him and Fleance.
Act 3 Scene 4
As broad and general as the casing air: But now I am cabined, cribbed, confined, bound in To saucy doubts and fears.
Macbeth deals with his vexations of Banquo in a clash of words with his wife. He says that the dead are better off, and that they do not need to worry of this world. Lady Macbeth says that he must remain tranquil and cease his period of fear. However, Macbeth says that he will not stop worrying as long as Banquo and Fleance are still alive. Lady Macbeth says they will not live forever. Macbeth agrees and tells her to treat him with eminence. Both then exit.
Act 3 Scene 5
He shall spurn fate, scorn death, and bear His hopes 'bove wisdom, grace, and fear: And you all know, security, Is mortals' chiefest enemy.
The murderers were in position and then unleashed an ambush upon Banquo and Fleance. They kill Banquo but the prophesied future king manages to escape in the utter chaos, leaving the task incomplete.
Act 3 Scene 6
His message ere he come, that a swift blessing May soon return to this our suffering country Under a hand accursed
And this report Hath so exasperated the king that he Prepares for some attempt of war
Macbeth invited his people to a banquet occurring at his palace. The first murderer arrives speaking of how Banquo had been eliminated but Fleance still lives. Soon after, Macbeth sees the ghost of Banquo while everyone is conversing. He was confused and frightened, wailing in question of who had done this. His guests, baffled by this, wondered what was wrong with him. Lady Macbeth assures them that he is just not feeling well. She then prompts the guests to leave.
The three witches meet with Hecate who is angry with their reckless behavior. She scolds them for telling Macbeth of prophesies of the future without her permission. But she says that the witches can make amends by meeting her in the morning and bring all the things they need to perform acts of and witchcraft, for Macbeth will arrive therein to learn of his future. She says to make him see illusions through their spells, which will tell him to be complacent and proud.
Lennox talks of the situation in Scotland with another Lord. He says that Macbeth had handled the murder of Duncan well, that he was justified in killing the two guards. Also, he mentioned of how Macbeth lamented upon Duncan and Banquo's deaths. Then the Lord says that Malcolm and Macduff have gone seeking King Edward's aid. Macbeth hears of this and is angered, and prepares for war. Macduff refuses to return to Scotland and Lennox thinks he will stay away.