"Hail Thane of Glamis, Hail Thane of Cawdor, you'll be king one day"
The Murder of King Duncan
The scene is the witches on the heath. The witches tell Macbeth of their prophecies. They tell Macbeth he will be the thane of Cawdor. He will be the Thane of Glamis. The last prophecy says he will be the king of Scotland.
Macbeth snakes into Duncans room after him and the guards fall asleep. Macbeth stabs Duncan. Macbeth makes the mistake of bringing his dagger with him. Lady Macbeth goes back to the room and puts the daggers back and smaers blood on the gaurds.