Three haggard old women, the witches, appear out of the storm in Scotland. They plan to meet with Macbeth after the battle, then they disappear.
"Fair is foul, and foul is fair."
The witches meet with Macbeth near the battlefield, and tell him he will go from Thane of Glamis, to Thane of Cawdor, and then will be crowned king. They also tell Banquo that he will never become king but that his sons will sit upon the throne. Confused, Macbeth and Banquo discuss what had happened.
All hail, Macbeth! Hail to thee, Thane of Glamis!
All hail, Macbeth! Hail to thee, Thane of Cawdor!
All hail, Macbeth, that shalt be King hereafter!
Lady Macbeth convinces Macbeth to kill King Duncan and claim the title of King. Macbeth doesn't want to commit regicide because Duncan is trustworthy, loyal to him, he had rewarded Macbeth with the title of Thane of Cawdor, and he thinks it will come back to haunt him. Macbeth finally accepts to kill Duncan after L.M. questions his manhood and tells him the plan.