"I have done the deed...I'll go no more. I am afraid to think what I have done. Look on 't again I dare not." (2.2.19)
"Infirm of purpose! Give me the daggers. The sleeping and the dead are but as pictures." (2.2.68-70)
Act 2, Scene 2
"My hands are [covered in blood now, too], but I shame to wear a heart so white." (2.2.82-83)
Act 2, Scene 3
"The night has been unruly. Where we lay, our chimneys were blown down and, as they say, lamentings heard i' th' air, strange screams of death." (2.3.61-64)
"Here's a knocking indeed! If a man were porter of hell gate, he should have old turning the key. Knock, knock, knock!" (2.3.1-3)
After Macbeth (grudgingly) stabs King Duncan, he emerges from the chamber with bloodied daggers, where he is met by his wife, Lady Macbeth. Reflecting with horror on what he is done, he refuses to plant the daggers on Duncan's attendants.
"Oh horror, horror, horror! Tongue nor heart cannot conceive nor name thee!" (2.3.73-74)
In order to ensure that Macbeth is exonerated and not accused of the murder, Lady Macbeth returns to plant the used daggers on the attendants.
"Here lay Duncan, his silver skin laced with his golden blood, and his gashed stabs looked like a breach in nature for ruin's wasteful entrance; there the murderers, steeped in the colors of their trade, their daggers unmannerly breeched with gore. Who could refrain, that had a heart to love, and in that heart courage to make 's love known?" (2.3.130-137)
"Help me hence, ho!" (2.3.138)
It's morning on the next day. Macbeth has cleaned up nicely, but the murder has yet to be discovered. Enter Lennox and Macduff, who have arrived to fetch the king. When Macbeth enters, they discuss everything that they heard during the night – including blown-out-chimneys and bloodcurdling screams. Macduff goes to wake the king.
"The sovereignty will fall upon Macbeth...He is already named and gone to Scone to be invested." (2.4.42-44)
"I'll to England." (2.3.162)
"To Ireland I." (2.3.163)
Macduff enters and interrupts the group to proclaim the death of King Duncan; he believes the murder to be too gruesome to describe and he encourages Macbeth and Lennox to see for themselves.
Act 2, Scene 3
The alarm bell is rung after Macduff, Macbeth, and Lennox see Duncan dead. Because the attendants were found with bloodied daggers, they are the accused. Macbeth admits to murdering the attendants in a fit of rage after seeing Duncan dead. To prevent this from raising questions, Lady Macbeth faints.
Act 2, Scene 3
After the death of their father, Donalbain and Malcolm decide it would be better for each of their personal safeties if they left Scotland; Donalbain heads to Ireland and Malcolm goes to England. Meanwhile, an Old Man, Ross, and Macduff discuss the many events that have just occurred and reflect on Macbeth's rapid ascent to the throne.