What would be some quotations that express Macbeth's betrayal toward King Duncan in Macbeth?

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teachertaylor eNotes educator| Certified Educator

In the first act of Macbeth, Duncan arrives at Inverness to celebrate Macbeth's new honor, and Macbeth says that Duncan is "here in double-trust."  Macbeth is Duncan's soldier and therefore his "servant," and he is pledged to be loyal to the king.  In this regard, Duncan trusts him.  Also, Macbeth is Duncan's host and should provide safety to him while he is a guest in Macbeth's castle.  So, Duncan trusts him for these two reasons and of course does not expect that Macbeth is plotting to murder him as he sleeps.  Here, Macbeth expresses his betrayal of Duncan as he details the reasons why Duncan holds him dear.