The kings gaurds came to him in scene iii
Macduff and Lennox. They were supposed to arrive early in the morning and wake up the king. Unfortunately everyone in the castle had partied to late at night and they are all sleeping in, so Macduff and Lennox have to bang on the door.
Mainly Macbeth, but I suppose his power-hungry wife as well.
Macbeth and his wife hurry back to their own chamber after murdering King Duncan because they hear a knocking at the gate, signaling that their crime may be discovered. They are also filled with guilt and fear, wanting to get away from the scene as quickly as possible. Lady Macbeth urges Macbeth to wash the blood off his hands and compose himself before anyone sees them.
Macbeth killed King Duncan after hearing the witches' prophecies and being urged on by his wife, Lady Macbeth
Retribution, maybe. It is Macduff who is knocking. Conscience, possibly. Lady Macbeth says, "Hark, more knocking! Get on your nightgown lest occasion call us and show us to be watchers" Damnation, perhaps. That is the essence of what the Porter says: that the knocking is someone trying to get into Hell.
the guards.
Macbeth and Lady Macbeth carried out the murder of King Duncan in their quest for power and control over the kingdom. They plotted and executed the deed to fulfill the witches' prophecies and seize the throne for themselves. This act sets in motion a series of tragic events that ultimately lead to their downfall.
Macbeth felt he had to kill the king's servants as they may have possibly figured out that it was him who killed the king. He then tells others he had to kill them as they had killed the king.
He had his suspicions because the fact the Macbeth killed the servants he blamed the murder on.
The title character, Macbeth, Thane of Cawdor.
King Duncan was killed by Macbeth in the latter's castle at Inverness.The king was asleep in his chamber which had two guards outside whom Lady Macbeth had given intoxicated drinks.Note : Due to Macbeth's prior decision of not killing Duncan, Lady Macbeth had decided to take up the 'business' . However, when she saw her father's face in Duncan's, she decided against killing the king herself.********
it simply means, that when he killed the king, he also killed sleep. Macbeth now wont be able to sleep because of the guilt of killing the king