In Shakespear's "Macbeth", what was the reason that macbeth organized the dinner at his palace?

The main reason for the feast was to make sure that Macbeth is seen openly mourning the death of his 'dear' friend Banquo who would have been killed by the assassins by then.

Explanation:

William Shakespeare's tragedy "Macbeth" is the story of how a selfish man became a king, murdering anyone who comes in his way.

Macbeth was initially just a general under King Duncan when on one of his journeys with Banquo, they met three witches who predicted that he will become king of Scotland. They also said that Banquo's children will rule the kingdom, meaning Macbeth will be overthrown. When he becomes king by mursering King Duncan, he also made sure to tie loose ends. He manipulated two killers to get rid of Banquo, blaming him for all their misfortunes.

For his plan to succeed, he called Banquo to the palace and asked about his travel plans. He needed to know so that the hired murderers will be able to strike him at the exact time. He then told Banquo that he had organised a dinner in his honor so he should come for that. Banquo said he will and left for his journey. Then, Macbeth told the men to make sure they kill Banquo and let him know at the dinner so that he will publicly mourn the death of his dear friend. He himself couldn't do the deed as he and Banquo have common friends which will make it complicated. But if he is seen grieving openly, the everyone will come to like him.