All. Fair is Foul, and foul is fair. Hover through the fog and filthy air.
Act 1 Scene 2
What he hath lost, noble Macbeth had won.
Act 1 Scene 3
All hail Thane of Glamis and Cawdor!
Three witches enter the scene and discuss about Macbeth. After discussing their needs they plan to meet next time in this same spot to talk more about Macbeth. Turns out by the next time they meet again Macbeth will also be there.
Banquo and Malcolm arrived at the camp where King Duncan is located to report the battle of the war they just had. They explained that the current Thane of Cawdor was a traitor and was defeated. After this they also decided to execute the current Thane of Cawdor and give the title to Macbeth, because he played an important role to defeat him.
Macbeth and Banquo arrive on the scene where the three witches are already there waiting. The three witches discuss their prophecies of Macbeth and Banquo. Macbeth's prophecy was receiving a new title which was the Thane of Cawdor, which he already had received; and to also become king. Banquo's prophecy was that his child would be king.