What is an example of dramatic irony in Shakespeare’s Macbeth?

In Shakespeare’s Macbeth the audience knows that Macbeth plans to kill King Duncan to fulfill the witches’ prophecy of his becoming king. However, Duncan and the other characters, aside from Lady Macbeth, are unaware of his plans. This dramatic irony creates tension and suspense as the audience anticipates the unfolding tragedy while other characters remain oblivious to Macbeth’s sinister plans and ambitions.