Banquo and king Duncan meet Lady Macbeth at Macbeth's abode.
This scene shows Lady Macbeth's two sidedness which is so developed that the king is unable to detect any malicious content from her. This also reassures the audiences idea that the king is an incredibly trusting person with Macbeth and Lady Macbeth.
See, see, our honored hostess! The love that follows us sometime is our trouble, which still we thank as love. And thank us for your trouble (1.6.11)
All our service, in every point twice done and then done double, were poor and single business to contend against those honors deep and broad wherewith your majesty loads our house. We rest your hermits (1.6.14)
Macbeth tells Lady Macbeth to slow down with the plans of killing the king.
The action vs. thoughts that Macbeth is having in this scene is to represent how indecisive and hesitant he is to do something like kill king Duncan. He also decides to lie to Lady Macbeth of his reasons to delay to murder as Shakespeare wanted the audience to know that Macbeth was not totally unwary of Lady Macbeth's manipulative nature.
First, as I am his kinsman and his subject, strong both against the deed; then, as his host, who should against his murderer shut the door, not bear the knife myself (1.7.13)
We will proceed no further in this business. He hath honored me of late, and I have bought golden opinions from all sorts of people, which would be worn now in their newest gloss, not cast aside so soon (1.7.31)
Macbeth meets Banquo in the hallway:
This scene further shows the king's generosity which creates confusion in Macbeth about his decision to go forth with the regicide. Shakespeare also added this to build tension between the audience who support king Duncan and what decision Macbeth will make regarding the murder.
What, sir, not yet at rest? The king’s a-bed. He hath been in unusual pleasure, and sent forth great largess to your offices. This diamond he greets your wife withal, by the name of most kind hostess, and shut up in measureless content (2.1.11)
After the murder of king Duncan:
Shows Macbeth's immense regret after the regicide. This also shows how mentally strong Lady Macbeth is compared to Macbeth who instantly starts regretting everything he has done. This compares the nature of both the characters so the audience knows that the more dominant one would be Lady Macbeth.
This is a sorry sight (2.2.20)
There’s one did laugh in ’s sleep, and one cried. “Murder!” … One cried, “God bless us!” and “Amen” the other (2.2.23)
I had most need of blessing, and “Amen” stuck in my throat (2.2.32)
A foolish thought, to say a sorry sight (2.2.21)
Consider it not so deeply (2.2.30)
Where king Duncan lay dead:
Further shows the two facedness of Lady Macbeth. But now, it has also affected Macbeth. Before, Lady Macbeth knew that Macbeth's facial expressions would give away his intentions but now Shakespeare has changed and developed the character to be more like Lady Macbeth.
Look to the lady (2.3.98)
Loyal and neutral, in a moment? No man. Th' expedition of my violent love outrun the pauser, reason. (2.3.89)
Help me hence, ho! (2.3.97)
Meanwhile, Malcolm and Donalbain were discussing the recent event of their father's death.
Due to both of the princes' selfish decision to save themselves instead of helping find their father's murderer, all eyes turned on them. Their cowardness led to people being suspicious as to why they both fled.
To Ireland, I. Our separated fortune shall keep us both the safer (2.3.119)
What will you do? Let’s not consort with them. To show an unfelt sorrow is an office which the false man does easy. I’ll to England (2.3.117)