All hail Macbeth, hail to thee, Thane of Cawdor .
All hail Macbeth, thou shalt be king hereafter" .
Banquo and Macbeth are startled by these predictions but Banquo is less convinced than Macbeth is. He questions Macbeth on if the witches" predictions will come true and he is quite weary on what the future holds, he show his weariness when he says," If you can look into the seeds of time." This implies that Banquo is trying to doubt the witches and not trying to make Macbeth carry out what the witches had said, so Banquo cannot be responsible. Also when the witches say," All hail Macbeth, thou shalt be king hereafter," it doesn't suggest in any way that Macbeth should murder king Duncan nor Malcolm to become king they only say that he will become king. Duncan could die of natural cause or any other way but murder, so the witches didn't say that he had to kill him. .
Lady Macbeth can also be responsible for persueing Macbeth to kill Duncan, she first appears reading the letter that she received from Macbeth, the letter informs her on the witches" predictions and Scotland winning the battle over the Norwegians. Then she reveals her thoughts to the audience in a soliloquy. She says that she would be very glad to be queen and she is fairly ambitious. The attendant then arrives and announces that king Duncan will be staying at the castle that night and that Macbeth is coming with them. When the attendant leaves she reveals her extremely evil intentions on her being queen in her small soliloquy. In act 1, scene5, she says," That croaks the fatal entrance of Duncan". This infers that Duncan shall arrive that night and something fatal will happen to him. Lady Macbeth has already planned what will happen to Duncan and she is full with evil ambitions for Duncan. In the same scene she says," That tend on mortal thoughts, unsex me here." This implies that she wants rid of her feminine gentle feelings and those to be replaced with evil intentions.