Banquo and Fleance enter with Fleance holding a torch.
The moon is down. I have not heard the clock.
Macbeth enters. Benquo gives him a diamond as a gift from the king for their hospitality.
He hath been in unusual pleasure, and Sent forth great largess to your offices.
Benquo tells Macbeth that he had a dream involving the witches, which Macbeth brushes off and tells him they'll talk about it later. Macbeth tells Benquo to stick with him, to which Benquo says as long as his conscience allows.
So I lose none In seeking to augment it, but still keep My bosom franchised and allegiance clear, I shall be counselled.
After Macbeth is alone, he starts hallucinating about seeing a knife.
Is this a dagger which I see before me, The handle toward my hand? Come, let me clutch thee
Macbeth ponders over whether the knife is real or just a manifestation of the crime he's about to commit.
Thou marshall’st me the way that I was going, And such an instrument I was to use.
Macbeth decides to go through with the murder
I go, and it is done. The bell invites me. Hear it not, Duncan, for it is a knell That summons thee to heaven or to hell.