Why does macbeth question banquo about where he is going prior to dinner?

The reason Macbeth question Banquo about where he is going prior to dinner:

Banquo is a general in the Scottish army who is with Macbeth when the three witches make their prophecy. Though he considers the three witches evil, their prophecy that not he but his children will be the King make him and his son Fleance the targeted enemies of Macbeth.

Macbeth has organized a feast and enquires of Banquo where he was going prior to dinner as he intends to send the three murderers after him and his son to kill both of them and clear obstacles in his path to fulfill his ambitions. Though he tells him to be there and fail not the feast, his plan contradicts his spoken word.

When Macbeth enquires of him he is quite suspicious that Banquo knows he has killed the king. Banquo tries to hide his fears regarding Macbeth being unfair. By killing him and his son, his intentions are to fail the prophecy of Banquo’s children being the king and get rid of the suspicious Banquo.

i pretty sure it is old

explanation:

11-32. the main character in the parable, the forgiving father, whose character remains constant throughout the story, is a picture of god. in telling the story, jesus identifies himself with god in his loving attitude to the lost. the younger son symbolizes the lost (the tax collectors and sinners of that day, luke 15: 1), and the elder brother represents the self-righteous (the pharisees and teachers of the law of that day, luke 15: 2). the major theme of this parable seems not to be so much the conversion of the sinner, as in the previous two parables of luke 15, but rather the restoration of a believer into fellowship with the father. in the first two parables, the owner went out to look for what was lost (luke 15: 1-10), whereas in this story the father waits and watches eagerly for his son's return. we see a progression through the three parables from the relationship of one in a hundred (luke 15: 1-7), to one in ten (luke 15: 8-10), to one in one (luke 15: 11-32), demonstrating god’s love for each individual and his personal attentiveness towards all humanity. we see in this story the graciousness of the father overshadowing the sinfulness of the son, as it is the memory of the father’s goodness that brings the prodigal son to repentance (romans 2: 4).