Act 1, Scene 3, Line 71 - Macbeth - "Stay, you imperfect speakers, tell me more"

In this quote, Macbeth is desperate, he has heard what the witches had told him, and he wants more information. He doesn't believe what they are telling him and Banquo at first, but at the end of the conversation with the witches he begins to believe in what they are telling him. After they are done talking to him they walk away, possibly knowing that he would want to know more. Macbeth says "Stay, you imperfect speakers, tell me more", he feels the need to know more about what they are saying because he is still uncertain of what they are telling him, he needed more guidance from them.