Banquo suspects that Macbeth killed Duncan in order to become king. Macbeth invites Banquo to a feast that night. Banquo promises to return in time. Macbeth, fearing that Banquo’s children, not his own, will be the future kings of Scotland, seizes upon the opportunity provided by Banquo’s scheduled return after dark to arrange for his murder. To carry out the crime, Macbeth employs two men whom he has persuaded to regard Banquo as an enemy.