Welcome hither. I have begun to plant thee, and will labor, to make thee full of growing. (1.4. 29)
Here's a knocking indeed! (2.3.1)
Was it so late, friend, ere you went to bed, that you do lie so late? (2.3.19-20)
(Enter Ross, Macbeth, Banquo and Angus) Before the King's death, he grants Macbeth the title of the thane of Cawdor, and strongly believes that Macbeth will be successful in it. Here is an example of how kind-hearted and naive the King as he prefers to handover Cawdor to a person he doesn't know will kill the him.
What's the matter? (2.3.66)
(The gate at Macbeth's castle) Macduff symbolizes the hero and the God-like figure. (Opens the gate. Enter Macduff and Lennox) The porter's drunken sleep is interrupted due to the knocking. He then makes references to hell which foreshadows the death of King Duncan, implying that Macbeth is the ruler of Hell.
What’s the business, that such a hideous trumpet calls to parley, the sleepers of the house? Speak, speak! (2.3.83-85)
O gentle lady, 'Tis not for you to hear what I can speak: The repetition, in a woman’s ear, would murder as it fell. (2.3.86-89)
Help me hence, ho! (2.3.127)
(Enter Macduff) As Macduff is supposed to wake King Duncan for royal duties. However, he waits for Macbeth to open the door. When Macduff enters King Duncan's room, he is shocked and is the first person to discover the King's death.
Wherefore did you so? (2.3.115)
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. 124-126)
When Macduff horrifyingly shrieks, Macbeth and Lennox become worried and figure out why is Macduff shrieking. (Exeunt Macbeth and Lennox)
(Bell rings. Enter Lady Macbeth) Lady Macbeth begins to question people on why the trumpet id being played, disrupting everyone sleeping. She insists on finding out about this although she understands that the murder has been committed.
Macduff begins to question Macbeth on his killing of the guards. Whereas Lady Macbeth feels uncomfortable in this situation, probably due to a sudden feel of guilt building in her.(Lady Macbeth is carried out)